Table Of Contents
Release Notes
for the Cisco 2500 Series Routers
for Cisco IOS Release 11.2Determining Your Cisco IOS Release
Cisco 2500 Series Routers and Access Servers
New Cisco 2500 Series Routers and Access Servers Supported by Release 11.2
Cisco AS2509-RJ and Cisco AS2511-RJ Access Servers
New Features in Release 11.2(1)
IP Protocol and Feature Enhancements
Multimedia and Quality of Service
Data Link Switching+ Features and Enhancements
Cisco IOS Feature Sets for Cisco 2500 Series Routers and Access Servers
Table 8 Cisco 2500 Fixed FRAD Series
LAN FRAD1X
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X
X
—
—
—
—
X
X
X
X
X
X
X
X
—
X
X
—
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
—
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
—
—
X
X
X10
X
X
X10
X
X
X
X
X
X
X
—
X
X
—
X
X
—
X
X
X
X
X
X
X
—
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
—
—
X
X
X
X
X
X
X
X
X
via local acknowledgmentX
X
X
—
X
X
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X
X
1 The OSPF LANFRAD feature set for the Cisco 2500 Fixed FRAD routers is available in Release 11.2(6)P and later.
2 Includes AppleTalk load balancing.
3 IRB supports IP, IPX, and AppleTalk; it is supported for transparent bridging, but not for SRB; it is supported on all media-type interfaces except X.25 and ISDN bridged interfaces; and IRB and concurrent routing and bridging (CRB) cannot operate at the same time.
4 The Novell IPX feature includes display SAP by name, IPX Access Control List violation logging, and plain-English IPX access lists.
5 Translational bridging is fast switched, but this can be disabled.
6 PPP includes support for LAN protocols supported by the feature set, address negotiation, PAP and CHAP authentication, PPP compression, and Multilink PPP.
7 IPX header compression (RFC 1553) is available in the feature sets that support IPX.
8 X.25 and Frame Relay payload compression.
9 BGP4 includes soft configuration, multipath support, and prefix filtering with inbound route maps.
10 Enhanced IGRP in the OSPF LANFRAD feature set is only available in Release 11.2(4). Cisco does not support this functionality in any releases of the OSPF LANFRAD feature set, and this feature is subject to removal without notice.
11 RMON events and alarms is supported on all interfaces.
12 TACACS+ Single Connection and TACACS+ SENDAUTH enhancements are supported.
13 Cisco IOS Release 11.2 introduces several DLSw+ enhancements available in the Plus, Plus 40, and Plus 56 feature sets.
14 SRB/RSRB is fast switched. This enhancement is on by default, but can be disabled.
Upgrading to a New Software Release
Caveats for Release 11.2(1) Through 11.2(12)
Caveats for Release 11.2(1) Through 11.2(11)
Caveats for Release 11.2(1) Through 11.2(10)
Caveats for Release 11.2(1) Through 11.2(9)
Caveats for Release 11.2(1) Through 11.2(8)
Caveats for Release 11.2(1) Through 11.2(7)
Caveats for Release 11.2(1) Through 11.2(6)
Caveats for Release 11.2(1) Through 11.2(5)
Caveats for Release 11.2(1) Through 11.2(4)
Caveats for Release 11.2(1) Through 11.2(3)
Release Notes
for the Cisco 2500 Series Routers
for Cisco IOS Release 11.2
March 2, 1998
These release notes describe the new features and significant software components for Cisco IOS Release 11.2, up to and including Release 11.2(11) for Cisco 2500 series routers and access servers. These release notes also describe the new software features only available with Release 11.2(12) and above.
Introduction
These release notes discuss the following topics:
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Determining Your Cisco IOS Release
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Determining Your Cisco IOS Release
To determine which version of Cisco IOS software is running on your Cisco 2500 series router or access server, log in to the router, and enter the show version user EXEC command:
router# show versionCisco Internetwork Operating System SoftwareIOS (tm) 2500 Software (C2500-J-L), Version 11.2(12), RELEASE SOFTWARE (fc1)Copyright (c) 1986-1997 by cisco Systems, Inc.Compiled Mon 10-Feb-97 13:03 by ajchopraImage text-base: 0x0303D558, data-base: 0x00001000ROM: System Bootstrap, Version 11.0(10c), SOFTWAREROM: 3000 Bootstrap Software (IGS-BOOT-R), Version 11.0(10c), RELEASESOFTWARE (fc1)burns uptime is 1 minuteSystem restarted by reloadSystem image file is "flash:username/c2500-j-l.112-4", booted via flashcisco 2500 (68030) processor (revision A) with 4096K/2048K bytes of memory.Processor board ID 01207404, with hardware revision 00000000Bridging software.SuperLAT software copyright 1990 by Meridian Technology Corp).X.25 software, Version 2.0, NET2, BFE and GOSIP compliant.TN3270 Emulation software (copyright 1994 by TGV Inc).1 Ethernet/IEEE 802.3 interface(s)2 Serial network interface(s)32K bytes of non-volatile configuration memory.8192K bytes of processor board System flash partition 1 (Read ONLY)8192K bytes of processor board System flash partition 2 (Read/Write)Configuration register is 0x0Cisco 2500 Series Routers and Access Servers
The following Cisco 2500 series routers and access servers are supported by Release 11.2:
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New Cisco 2500 Series Routers and Access Servers Supported by Release 11.2
Cisco IOS Release 11.2 supports Cisco AS2509-RJ and Cisco AS2511-RJ access servers. and summarize the interfaces supported for these devices.
Table 1 LAN Interfaces Supported
Ethernet (AUI)
Yes
4-Mbps Token Ring
No
16-Mbps Token Ring
No
"Yes" means that a particular data rate or interface is supported. "No" means it is not supported.
Cisco AS2509-RJ and Cisco AS2511-RJ Access Servers
The Cisco AS2509-RJ and Cisco AS2511-RJ access servers connect asynchronous serial devices to LANs and WANs. The access servers combine the functions of a terminal server, protocol translator, and a router and perform both synchronous and asynchronous routing of supported protocols.
These access servers provide the following interfaces and ports:
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Generated SysObjectID's
The Generated SysObjectID feature generates a unique sysObjectID for each Cisco 2500 series router and its derived partner product. For example, the sysObjectID values for a Cisco 2511, a partner's 2511, and another partner's 2511 will each be different. The sysObjectID Simple Network Management Protocol (SNMP) MIB object is used to identify the device to be managed and make application-specific decisions. In some network management programs, this object determines which graphical element or name to display for a device.
Documentation
For Cisco IOS Release 11.2, the Cisco IOS documentation set consists of eight documentation modules. Each documentation module has a configuration guide, a command reference, and five supporting documents.
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The books and chapter topics are as follows:
These documents are available as printed manuals or electronic documents. For electronic documentation of Release 11.2 router and access server software features, refer to the Cisco IOS Release 11.2 configuration guides and command references located in the Cisco IOS Release 11.2 database on the Documentation CD-ROM. You can also access Cisco technical documentation on the World Wide Web at http://www.cisco.com.
Online Navigation
The Cisco IOS software documentation set is available as printed manuals or electronic documents. You can access the electronic documents either on the Cisco Documentation CD-ROM or at Cisco Connection Online (CCO) on the World Wide Web:
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New online navigation enhancements for Release 11.2 include:
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On the Documentation CD-ROM or CCO, go to Cisco IOS Release 11.2, and select Cisco IOS Release 11.2 Configuration Guides, Command References. Then select Configuration Guide Master Index or Command Reference Master Index. To access documentation related to an index entry, click the page number following the entry.
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On the Documentation CD-ROM or CCO, go to Cisco IOS Release 11.2, and select Cisco IOS Release 11.2 Configuration Guides, Command References. Next, select Cisco IOS 11.2 New Features.
To access configuration documentation for a feature, do one of the following:
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For additional information about the Documentation CD-ROM and CCO, refer to the sections "Cisco Connection Online" and "Documentation CD-ROM" at the end of these release notes.
New Features in Release 11.2(1)
The features described in this section are supported in 11.2 and 11.2 P images or feature sets. This section is divided into the following subjects:
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Routing Protocols
This section describes routing protocol features that are new in the initial release of Cisco IOS Release 11.2.
IP Protocol and Feature Enhancements
The following new IP protocol software features are available:
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A stub router is the peripheral router in a hub-and-spoke network topology. Stub routers commonly have a WAN connection to the hub router and a small number of LAN network segments (stub networks) that are connected directly to the stub router. To provide full connectivity, the hub routers can be statically configured to know that a particular stub network is reachable via a specified access router. However, if there are multiple hub routers, many stub networks, or asynchronous connections between hubs and spokes, the overhead required to statically configure knowledge of the stub networks on the hub routers becomes too great.
ODR simplifies installation of IP stub networks in which the hub routers dynamically maintain routes to the stub networks. This is accomplished without requiring the configuration of an IP routing protocol at the stub routers. With ODR, the stub advertises IP prefixes corresponding to the IP networks that are configured on its directly connected interfaces. Because ODR advertises IP prefixes, rather than IP network numbers, ODR is able to carry Variable Length Subnet Mask (VLSM) information.
Once ODR is enabled on a hub router, the router begins installing stub network routes in the IP forwarding table. The hub router can also be configured to redistribute these routes into any configured dynamic IP routing protocols. IP does not need to be configured on the stub router. With ODR, a router is automatically considered to be a stub when no IP routing protocols have been configured on it.
The routing protocol that ODR generates is propagated between routers using Cisco Discovery Protocol (CDP). Thus, ODR is partially controlled by the configuration of CDP. Specifically,
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It is recommended that IP filtering be used to limit the network prefixes that the hub router will permit to be learned dynamically through ODR. If the interface has multiple logical IP networks configured (via the IP secondary command), only the primary IP network is advertised through ODR.
Open Shortest Path First Enhancements
The following features have been added to Cisco OSPF software:
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The feature allows the consolidation on a single routing protocol and the benefits of the OSPF routing protocol across the entire network, without incurring excess connection costs.
If the router is part of a point-to-point topology, only one end of the demand circuit needs to be configured for OSPF On-Demand Circuit operation. In point-to-multipoint topologies, all appropriate routers must be configured with OSPF On-Demand Circuit. All routers in an area must support this feature—that is, be running Cisco IOS Software Release 11.2 or greater.
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OSPF NSSA defines a more flexible, hybrid method, whereby stub areas can import external OSPF routes in a limited fashion so that OSPF can be extended across the stub to backbone connection.
NSSA enables OSPF to be extended across a stub area to backbone area connection to become logically part of the same network.
Border Gateway Protocol Version 4 (Enhancements
The following features have been added to Cisco BGP4 software:
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BGP4 Multipath Support can support up to six paths.
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Network Address Translation
Network Address Translation (NAT) provides a mechanism for a privately addressed network to access registered networks, such as the Internet, without requiring a registered subnet address. This eliminates the need for host renumbering and allows the same IP address range to be used in multiple intranets.
With NAT, the privately addressed network (designated as "inside") continues to use its existing private or obsolete addresses. These addresses are converted into legal addresses before packets are forwarded onto the registered network (designated as "outside"). The translation function is compatible with standard routing; the feature is required only on the router connecting the inside network to the outside domain.
Translations can be static or dynamic in nature. A static address translation establishes a one-to-one mapping between the inside network and the outside domain. Dynamic address translations are defined by describing the local addresses to be translated and the pool of addresses from which to allocate outside addresses. Allocation is done in numeric order and multiple pools of contiguous address blocks can be defined.
NAT:
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Because the addressing scheme on the inside network might conflict with registered addresses already assigned within the Internet, NAT can support a separate address pool for overlapping networks and translate as appropriate.
Applications that use raw IP addresses as a part of their protocol exchanges are incompatible with NAT. Typically, these are less common applications that do not use fully qualified domain names.
Named IP Access Control List
The Named IP Access Control List (ACL) feature gives network managers the option of using names for their access control lists. Named IP ACL function similarly to their numbered counter-parts.
This feature also includes a new configuration mode that supports addition and deletion of single lines in a multiline access control list.
This feature eliminates some of the confusion associated with maintaining long access control lists. Meaningful names can be assigned, making it easier to remember which service is controlled by which access control list. Moreover, this feature removes the limit of 100 extended and 99 standard access control lists so that additional IP access control lists can be configured.
The new configuration feature allows a network manager to edit access control lists, rather than re-creating the entire list.
Currently, only packet and route filters can use Named IP ACL. Also, named IP ACLs are not backward-compatible with earlier releases of Cisco IOS software.
Named IP ACLs are not currently supported with Distributed Fast Switching.
Multimedia and Quality of Service
The following features have been added to Cisco multimedia and quality of service software:
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RSVP requires both a network implementation and a client implementation. Applications need to be RSVP-enabled to take advantage of RSVP functionality. Currently, Precept provides an implementation of RSVP for Windows-based PCs. Companies such as Sun and Silicon Graphics have demonstrated RSVP on their platforms. Several application developers are planning to take advantage of RSVP in their applications.
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RED is enabled on a per-interface basis. It "throttles back" lower-priority traffic first, allowing higher-priority traffic (as designated by an RSVP reservation or the IP precedence value) to continue.
RED works with RSVP to maintain end-to-end quality of service during peak traffic loads. Congestion is avoided by selectively dropping traffic during peak load periods. This is performed in a manner designed to damp out waves of sessions going through TCP slow start.
Existing networks can be upgraded to better handle RSVP and priority traffic. Additionally, RED can be used in existing networks to manage congestion more effectively on higher-speed links where fair queuing is expensive.
Exercise caution when enabling RED on interfaces that support multiprotocol traffic (in addition to TCP/IP), such as IPX or AppleTalk. RED is not designed for use with these protocols and could have deleterious affects.
RED is a queuing technique; it cannot be used on the same interface as other queuing techniques, such as Standard Queuing, Custom Queuing, Priority Queuing, or Fair Queuing.
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Topologies that have high-speed links feeding into lower-speed links—such as a central site to a remote or branch sites—often experience bottlenecks at the remote end because of the speed mismatch. Generic Traffic Shaping helps eliminate the bottleneck situation by throttling back traffic volume at the source end.
Routers can be configured to transmit at a lower bit rate than the interface bit rate. Service providers or large enterprises can use the feature to partition, for example, T1 or T3 links into smaller channels to match service ordered by customers.
Generic Traffic Shaping implements a Weighted Fair Queuing (WFQ) on an interface or subinterface to allow the desired level of traffic flow. The feature consumes router memory and CPU resources, so it must be used judiciously to regulate critical traffic flows while not degrading overall router performance.
Multiprotocol Routing
The following enchancement has been made to Cisco multiprotocol routing:
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These enhancements are particularly applicable in networking environments having many low-speed links (typically in hub-and-spoke topologies); in Non-Broadcast-Multiple-Access (NBMA) wide-area networks such as Frame Relay, ATM, or X.25 backbones; and in highly redundant, dense router-router peering configurations. It should be noted that the basic Enhanced IGRP routing algorithm that exhibits very fast convergence and guaranteed loop-free paths has not changed, so there are no backwards compatibility issues with earlier versions of Cisco IOS software.
Switching Features
The following feature has been added to Cisco switching software:
Integrated Routing and Bridging—Integrated routing and bridging (IRB) delivers the functionality to extend VLANs and Layer 2 bridged domains across the groups of interfaces on Cisco IOS software-based routers and interconnect them to the routed domains within the same router.
The ability to route and bridge the same protocol on multiple independent sets of interfaces of the same Cisco IOS software-based router makes it possible to route between these routed and the bridged domains within that router. IRB provides a scalable mechanism for integration of Layer 2 and Layer 3 domains within the same device.
Integrated routing and bridging provides:
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Desktop Protocols
This section describes the desktop protocol features that are new in the initial release of Cisco IOS Release 11.2.
AppleTalk Features
The following feature has been added to Cisco AppleTalk software:
AppleTalk Load Balancing—This feature allows AppleTalk data traffic to be distributed more evenly across redundant links in a network.
AppleTalk load balancing can reduce network costs by allowing more efficient use of network resources. Network reliability is improved because the chance that network paths between nodes will become overloaded is reduced. For convenience, load balancing is provided for networks using native AppleTalk routing protocols such as Routing Table Maintenance Protocol (RTMP) and Enhanced IGRP.
AppleTalk load balancing operates with process and fast switching.
Novell Features
The following features have been added to Cisco Novell software:
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This feature allows logging of
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Matching packets and logging-enabled ACLs are sent at the process level. Router logging facilities use the IP protocol.
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Protocol types supported include RIP, SAP, NCP, and NetBIOS. Supported socket types include Novell Diagnostics Packet Enhanced IGRP and NLSP.
Plain English IPX Access Lists greatly reduce the complexity and increase the readability of IPX extended access control lists, reducing network management expense by making it easier to build and analyze the access control mechanisms used in IPX networks.
Wide-Area Networking Features
This section describes the wide-area networking features that are new in the initial release of Cisco IOS Release 11.2.
ISDN/DDR Enhancements
The following features have been added to Cisco ISDN and DDR software:
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MMP is based on the concept of a stackgroup—a group of routers or access servers that operate as a group when receiving MLP calls. Any member of the stackgroup can answer any call into the single access number applied to all WAN interfaces. Typically, the access number corresponds to a telco hunt group.
Cross-platform aggregation is performed via tunneling between members of a stackgroup using the Level 2 Forwarding (L2F) protocol, a draft IETF standard.
MMP is flexible and scalable. Because the L2F protocol is IP-based, members of a stackgroup can be connected over many types of LAN or WAN media. Stackgroup size can be increased by increasing the bandwidth available to the L2F protocol, for example, by moving from shared to switched Ethernet.
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Service providers who wish to offer private dial-up network services can use VPDN to provide a single telephone number for all their client organizations. A customer can use dial-up access to a local point of presence where the access server identifies the customer by PPP username. The PPP username is also used to establish a home gateway destination. When the home gateway is identified, the access server builds a secure tunnel across the service provider backbone to the customer home gateway. The PPP session is also transported to this home gateway, where local security measures can ensure the person is allowed access to the network behind the home gateway.
Of special interest to service providers is the VPDN independence of WAN technology. Because L2F is TCP/IP-based, it can be used over any type of service-provider backbone network.
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Dialer profile extends the flexibility of current dial-up configurations. For example, on a single ISDN PRI or PRI rotary group, it is now possible to allocate separate profiles for different classes of user. These profiles might define normal DDR usage or backup usage.
Each dialer profile uses an Interface Descriptor Block (IDB) distinct from the IDB of the physical interface used to place or receive calls. When a call is established, both IDBs are bound together so that traffic can flow. As a result, dialer profiles use more IDBs than normal DDR.
This initial release of dialer profiles does not support Frame Relay, X.25, or Link Access Procedure Balance (LAPB) encapsulation on DDR links or Snapshot Routing capabilities.
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A large installed base of early Combinet product users could not upgrade to later software releases that support interoperability standards such as PPP. With CPP support, these users can integrate their existing product base into new Cisco IOS software-based internetworks.
CPP does not provide many of the functions available in the Cisco implementation of the PPP standards. These functions include address negotiation and support for protocols like AppleTalk. Where possible, Cisco recommends that customers migrate to software that supports PPP.
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This feature is process switched.
Frame Relay Enhancements
The following features have been added to Cisco Frame Relay software:
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Frame Relay SVCs offer cost savings via usage-based pricing instead of fixed pricing for a PVC connection, dynamic modification of network topologies with any-to-any connectivity, dynamic network bandwidth allocation, or bandwidth-on-demand for large data transfers such as FTP traffic, backup for PVC backbones, and conservation of resources in private networks.
To use Frame Relay SVCs, Frame Relay SVC must be supported by the Frame Relay switches used in the network. Also, a Physical Local Loop Connection, such as a leased or dedicated line, must exist between the router (DTE) and the local Frame Relay switch.
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The Frame Relay protocol defines several parameters that are useful for managing network traffic congestion. These include Committed Information Rate (CIR), Forward/Backward Explicit Congestion Notification (FECN/BECN), and Discard Eligibility (DE) bit. Cisco already provides support for FECN for DECnet and OSI, BECN for Systems Network Architecture (SNA) traffic using direct LLC2 encapsulation via RFC 1490, and DE bit support. The Frame Relay Traffic Shaping feature builds upon this support by providing the following three capabilities:
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Frame Relay Traffic Shaping:
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The three capabilities of the Traffic Shaping for Frame Relay feature require the router to buffer packets to control traffic flow and compute data rate tables. Because of this router memory and CPU utilization, these features must be used judiciously to regulate critical traffic flows while not degrading overall Frame Relay performance.
IBM Functionality
This section describes the IBM network software features and support that are new in the initial release of Cisco IOS Release 11.2.
New Features
The following new IBM software features are available:
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The NCIA server supports SNA and NetBIOS sessions over a variety of LAN and WAN connections, including dial-up connections. The NCIA architecture supports clients with full SNA stacks, providing all advanced SNA capabilities, unlike some split-stack solutions.
NCIA server enhancements provide:
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Note that each client is a full SNA physical unit (PU) with one or more logical unit (LU)s. As such, each device requires one LLC connection at the central site router. The Cisco 4700 currently supports 3000 to 4000 LLC connections.
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The TN3270 Server on the CIP supports up to 8000 concurrent sessions on a CIP and up to 16,000 concurrent sessions on a CIP2 card. The TN3270 Server offers the following advanced capabilities:
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TN3270 Server requires 32 MB of CIP DRAM to support up to 4000 sessions, 64 MB to support 8000 sessions, and 128 MB to support 16000 sessions. TN3270 Server can run concurrently with any of the other CIP applications (IP Datagram, TCP/IP Off-load, or CSNA), but operation of any of these features affects the total number of sessions supported due to contention for CIP processor cycles.
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Fast Switched SR/TLB improves performance on all platforms by a factor of at least two. It is ideal for IBM environments (for example, where low-cost Ethernet adapters are being installed on campus, but Token Ring connectivity to a front-end processor (FEP) is still required) and for campus environments with a mix of Token Ring and Ethernet LANs or switches that rely on the Cisco IOS software for translational bridging.
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RTR enables the following functions to be performed:
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The RTR feature is currently available only with feature sets that include IBM support. A CiscoWorks Blue network management application will be available to support the RTR feature. Both the CiscoWorks Blue network management application and the router use the Cisco Round Trip Time Monitor (RTTMON) MIB. This MIB is also available with Release 11.2.
APPN Enhancements
The following features have been added to Cisco Advanced Peer-to-Peer Networking (APPN) software:
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The CDS reduces broadcast traffic in the network. Without an active CDS on ACF/VTAM, the NN must send a broadcast message to the network to locate nonlocal resources required for a session. With an active CDS, the NN sends a single request directly to the CDS for the location of the resource. A network broadcast is used only if the resource has not registered with the CDS.
ACF/VTAM must be configured as a CDS. The Cisco IOS NN learns of the capability when network topology is exchanged. To most effectively use the CDS, ENs should register the resources with the NN. Depending on the EN implementation, registration might occur automatically, might require configuration on the EN, or might not be a function of the EN.
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With the APPN DLUR MIB, users have access to information collected about the DLUR function in the Cisco IOS NN and the DLUs attached to it for more complete network management information.
Data Link Switching+ Features and Enhancements
The following features have been added to Cisco DLSw+ software. These features had previously been available with Remote Source-Route Bridging (RSRB). To provide these features for DLSw+, the Cisco IOS software uses a component known as Virtual Data Link Control (VDLC) that allows one software component to use another software component as a data link.
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With this feature, LNM can be used to manage Token Ring LANs, Control Access Units (CAUs), and Token Ring attached devices over a DLSw+ network. All management functions continue to operate as they would in an RSRB network or source-route bridged network.
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With this feature, NSP can be configured in remote routers, and DLSw+ can provide the path for the remote service point PU to communicate with NetView. This allows full management visibility of resources from a NetView 390 console, while concurrently offering the value-added features of DLSw+ in an SNA network.
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DSPU concentration consolidates the appearance of up to 255 physical units into a single PU appearance to VTAM, minimizing memory and cycles in central site resources (VTAM, NCP, and routers) and speeding network startup. Used in conjunction with DLSw+, network availability and scalability can be maximized.
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With this feature, DLSw+ can be used as a low-cost way to access an APPN backbone or APPN in the data center. In addition, DLSw+ can be used as a transport for APPN, providing nondisruptive recovery from failures and high-speed intermediate routing. In this case, the DLSw+ network appears as a connection network to the APPN network nodes (NNs).
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This feature allows SRB over FDDI to provide the highest speed access between campus resources, while concurrently allowing DLSw+ for access to remote resources.
Currently, SRB over FDDI is supported by the Cisco 7000 and Cisco 7500 series platforms only.
Security Features
This section describes the security features that are new in the initial release of Cisco IOS Release 11.2.
New Features
The following new security features are new to this release:
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This feature can be used to build multiprotocol Virtual Private Networks (VPNs), using encrypted Generic Routing Encapsulation (GRE) tunnels. It can also be used to deploy secure telecommuting services, Intranet privacy, and virtual collaborative or community-of-interest networks.
All components of this feature are subject to U.S. Department of Commerce export regulations. Encryption is currently IP only, though it does support multiprotocol GRE tunnels. This feature is most appropriately deployed in a relatively small number of routers, with a logically flat or star-shaped encryption topology. Load-sharing of the encryption/decryption function is not supported. Without a Certification Authority (CA), the one-time authentication effort increases exponentially with the number of routers. Router authentication requires the network administrator to compare the hashes produced by the router, once during initial configuration. This version of encryption is not IPSEC compliant.
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Systems with existing Kerberos V infrastructures can use their Key Distribution Centers (KDCs) to authenticate end-users for network or router access.
This is a client implementation, not a Kerberos KDC. Kerberos is generally considered a legacy security service and is most beneficial in networks already using Kerberos.
TACACS+ Enhancements
The following features have been added to the Cisco Terminal Access Controller Access Control System (TACACS)+ software:
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Single Connection is an optimization whereby the network access server maintains a single TCP connection to one or more TACACS+ daemons. The connection is maintained in an open state for as long as possible, instead of being opened and closed each time a session is negotiated. It is expected that Single Connection yields performance improvements on a suitably constructed daemon.
Currently, only the CiscoSecure daemon V1.0.1 supports Single Connection. The network access server must be explicitly configured to support a Single Connection daemon. Configuring Single Connection for a daemon that does not support this feature generates errors when TACACS+ is used.
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The network access server can support both SENDAUTH and SENDPASS simultaneously. It detects if the daemon is able to support SENDAUTH and, if not, will use SENDPASS instead. This negotiation is virtually transparent to the user, with the exception that the down-rev daemon can log the initial SENDAUTH packet as unrecognized.
SENDAUTH functionality requires support from the daemon, as well as the network access server.
Network Management
This section describes the network management features that are new in the initial release of Cisco IOS Release 11.2.
MIBs Supported
The following MIB support has been added:
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Cisco IOS Feature Sets for Cisco 2500 Series Routers and Access Servers
This section lists Cisco IOS software feature sets available in Cisco IOS Release 11.2.
These features are available in specific features sets on specific platforms.Table 3 through Table 8 use these feature set matrix symbols to identify features:
Cisco IOS images with 40-bit Data Encryption Standard (DES) support may legally be distributed to any party eligible to receive Cisco IOS software. 40-bit DES is not a cryptographically strong solution and should not be used to protect sensitive data.
Cisco IOS images with 56-bit DES are subject to International Traffic in Arms Regulations (ITAR) controls and have a limited distribution. Images to be installed outside the U.S. require an export license. Customer orders may be denied or subject to delay because of U.S. government regulations. Contact your sales representative or distributor for more information, or send e-mail to export@cisco.com.
Table 3 Cisco IOS Release 11.2 Feature Set Matrix
CFRAD 1
—
Basic
Basic
LAN FRAD2
—
Basic
Basic
OSPFLAN FRAD2
—
Basic
Basic
IP
Basic
—
Basic, Plus, Encrypt
Remote Access Server
Basic
—
Basic
ISDN
—
—
Basic
IP/IPX/IBM/APPN
—
—
Basic
IP/IPX/AT/DEC
—
—
Basic, Plus, Encrypt
Enterprise
—
—
Basic, Plus, Encrypt
Enterprise APPN
—
—
Plus, Encrypt
1 Supported only on the Cisco 2501CF, 2502CF, and 2520CF-2523CF.
2 Supported only on the Cisco 2501LF, 2502LF, and 2520LF-2523LF.
Table 4 Cisco 2500 Series Software Feature Sets
(IP/IPX/AppleTalk/DEC)—
—
—
Basic
—
—
Basic
Basic
—
—
—
Basic
Basic
Basic
Basic
Basic
—
—
Basic
Basic
—
—
—
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
—
Basic
Basic
Basic
—
—
—
Basic
—
—
—
—
Basic
Basic
Basic
Basic
—
—
—
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
—
—
—
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
—
Basic
Basic
Basic
Basic
Basic
Basic
Basic
—
—
—
Basic
—
—
—
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
—
—
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
—
—
—
Basic
Basic
Basic
Basic
Basic
—
—
—
Basic
Basic
Basic
Basic
Basic
Plus
—
Plus
Plus
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
—
—
Basic
Basic
—
Basic
Basic
Basic
—
Basic
Basic
Basic
—
—
Basic
Basic
—
—
Basic
Basic
—
—
—
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Plus
Plus
Plus
Plus
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
—
—
—
Basic
—
—
—
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Encrypt
—
Encrypt
Encrypt
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
—
Basic
—
Basic
Plus
Basic
Plus
Basic
Plus
Basic
Plus
Basic
Plus
Basic
Plus
Basic
Plus
Basic
Plus
Basic
Plus
Basic
Plus
Basic
Plus
Basic
Plus
Basic
Plus
Basic
Plus
Basic
Plus
Basic
Plus
Basic
Plus
Basic
Plus
Basic
Plus
Basic
Plus
Basic
Plus
Basic
Plus
Basic
Plus
Basic
Plus
Basic
Plus
Basic
Plus
Basic
via local acknowledgmentPlus
Basic
Plus
Basic
Plus
Basic
Plus
Basic
Plus
Basic
Plus
Basic
—
—
—
Basic
—
—
—
Basic
—
—
—
Basic
—
—
—
Basic
—
—
Basic
Basic
Basic
Basic
Basic
Basic
—
—
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
—
—
—
Basic
—
Basic
Basic
Basic
—
—
Basic
Basic
—
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
—
—
—
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
—
—
—
Basic
Basic
Basic
Basic
Basic
—
—
—
Basic
1 This feature set has no additional options. It offers a low-end APPN solution for this set of hardware platforms. This feature set is not available for AccessPro PC Cards.
2 Enterprise is available with APPN in a separate feature set. APPN includes APPN Central Registration (CRR) and APPN over DLSw+. APPN is not available on the AccessPro PC Card.
3 Includes AppleTalk load balancing.
4 IRB supports IP, IPX, and AppleTalk; it is supported for transparent bridging, but not for SRB; it is supported on all media-type interfaces except X.25 and ISDN bridged interfaces; and IRB and concurrent routing and bridging (CRB) cannot operate at the same time.
5 The Novell IPX feature includes display SAP by name, IPX Access Control List violation logging, and plain-English IPX access lists.
6 Translational bridging is fast switched by default but can be disabled.
7 ISDN support includes calling line identification (ANI), X.25 over the B channel, ISDN subaddressing, and applicable WAN optimization features.
8 PPP includes support for LAN protocols supported by the feature set, address negotiation, PAP and CHAP authentication, Multilink PPP, and PPP compression.
9 X.25 includes X.25 switching.
10 IPX header compression (RFC 1553) is available in the feature sets that support IPX.
11 BGP4 includes soft configuration, multipath support, and prefix filtering with inbound route maps.
12 The RMON events and alarms groups are supported on all interfaces. Full RMON support is available with the Plus feature sets.
13 The RMON events and alarms groups are supported on all interfaces. Full RMON support is available with the Plus feature sets.
14 MAC security for hubs is applicable to the following Cisco 2500 series Ethernet hub models: Cisco 2505, Cisco 2507, Cisco 2516, and Cisco 2518.
15 TACACS+ Single Connection and TACACS+ SENDAUTH enhancements are supported.
16 Cisco IOS Release 11.2 introduces several DLSw+ enhancements available in the Plus, Plus 40, and Plus 56 feature sets.
17 SRB/RSRB is fast switched. This enhancement is on by default, but can be disabled.
18 Use of LAT requires terminal license (FR-L8-10.X= for an 8-user license or FR-L16-10.X= for a 16-user license).
Table 5 Cisco 2500 Series Software Feature Sets
—
—
—
—
—
Cisco 2503I, Cisco 2504I
Basic
—
—
—
—
Cisco 2520CF-2523CF—
Basic
—
—
—
Cisco 2520LF-2523LF—
—
Basic
Basic
—
Cisco AS5100—
—
—
—
Basic
Basic
—
—
—
Basic
—
—
—
—
—
—
—
—
—
—
Basic
—
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
—
Basic
Basic
Basic
Basic
—
Basic
Basic
Basic
—
Basic
Basic
Basic
—
—
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
—
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
—
—
—
—
Basic
—
—
Basic
Basic
Basic
Basic
—
—
—
—
—
—
—
—
Basic
—
—
—
—
Basic
Basic
Basic
Basic
Basic
Basic
—
—
—
—
—
—
—
—
—
Basic
—
—
—
—
Basic
—
—
—
—
Basic
Basic
—
—
—
Basic
Basic
Basic
Basic
Basic
Basic
Basic
—
—
—
Basic
Basic
—
—
—
Basic
—
Basic
Basic
Basic
Basic
Basic
—
—
—
—
Basic
—
—
—
Basic
Basic
Basic
Basic
Basic
Basic
Basic
—
—
—
—
Basic
Basic
—
—
—
Basic
—
—
—
—
Basic
Basic
Basic
Basic13
Basic
Basic
Basic
Basic
Basic10
Basic
Basic
Basic
Basic
Basic
Basic
Basic
—
—
—
—
Basic
Basic
Basic
Basic
Basic
Basic
Basic
—
Basic
—
Basic
Basic
—
Basic
—
Basic
Basic
—
Basic
—
Basic
—
—
—
Basic
Basic
—
—
—
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
—
—
—
Basic
Basic
—
Basic
Basic
Basic
—
—
—
—
—
Basic
—
—
—
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
—
Basic
Basic
Basic
Basic
—
—
—
—
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
—
—
—
—
—
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
—
Basic
Basic
Basic
—
—
Basic
Basic
Basic
—
—
Basic
Basic
Basic
—
—
Basic
Basic
Basic
—
—
Basic
Basic
Basic
—
—
—
—
—
—
—
Basic
Basic
Basic
—
—
Basic
Basic
Basic
—
—
Basic
Basic
Basic
—
—
Basic
Basic
Basic
—
—
Basic
—
—
—
—
Basic
Basic
Basic
—
—
Basic
Basic
Basic
—
—
Basic
Basic
Basic
—
via local acknowledgment—
Basic
Basic
Basic
—
—
—
Basic
Basic
—
—
—
Basic
Basic
—
—
—
—
—
Basic
—
—
—
—
Basic
—
—
—
—
Basic
—
—
—
—
Basic
—
—
—
—
Basic
—
—
—
—
Basic
—
—
—
—
Basic
—
—
—
—
Basic
—
—
—
—
Basic
—
—
—
—
Basic
—
—
—
—
Basic
—
—
—
—
Basic
—
—
—
—
Basic
—
—
—
—
Basic
—
—
—
—
Basic
—
—
—
—
Basic
—
—
—
—
Basic
—
—
—
—
Basic
—
—
—
—
Basic
—
—
—
—
Basic
—
—
—
—
Basic
—
—
—
—
Basic
—
—
—
—
Basic
—
—
—
—
Basic
1 The OSPF LANFRAD feature set is available in Release 11.2(4) and later.
2 Includes AppleTalk load balancing.
3 IRB supports IP, IPX, and AppleTalk; it is supported for transparent bridging, but not for SRB; it is supported on all media-type interfaces except X.25 and ISDN bridged interfaces; and IRB and concurrent routing and bridging (CRB) cannot operate at the same time.
4 The Novell IPX feature includes display SAP by name, IPX Access Control List violation logging, and plain-English IPX access lists.
5 Translational bridging is fast switched, but this can be disabled.
6 ISDN support includes calling line identification (ANI), X.25 over the B channel, ISDN subaddressing, and applicable WAN optimization features.
7 PPP includes support for LAN protocols supported by the feature set, address negotiation, PAP and CHAP authentication, PPP compression, and Multilink PPP.
8 X.25 includes X.25 switching.
9 Bandwidth-on-demand means two B-channel calls to the same destination.
10 IPX header compression (RFC 1553) is available in the feature sets that support IPX.
11 X.25 and Frame Relay payload compression.
12 BGP4 includes soft configuration, multipath support, and prefix filtering with inbound route maps.
13 Enhanced IGRP in the OSPF LANFRAD feature set is only available in Release 11.2(4).
13 Cisco does not support this functionality in any releases of the OSPF LANFRAD feature set, and this feature is subject to removal without notice.
14 RMON events and alarms are supported on all interfaces.
15 Applicable to the following Cisco 2500 series Ethernet hub models: Cisco 2505, Cisco 2507, Cisco 2516, and Cisco 2518.
16 TACACS+ Single Connection and TACACS+ SENDAUTH enhancements are supported.
17 Cisco IOS Release 11.2 introduces several DLSw+ enhancements available in the Plus, Plus 40, and Plus 56 feature sets. See the section
"IBM Functionality" in the "New Features in Release 11.2(1)" section for more details.18 SRB/RSRB is fast switched. This enhancement is on by default, but can be disabled.
19 Remote node and terminal services supported on access servers (with limited support on router auxiliary ports).
20 IPX header compression (RFC 1553) is available in the feature sets that support IPX.
21 Use of LAT requires terminal license (FR-L8-10.X= or FR-L16-10.X=).
lists the standard feature sets supported in Release 11.2 P.
Table 6 Feature Set Matrix for Cisco 2500 Series Low-End Access Servers and Routers
IP
Basic
Remote Access Server
Basic
Feature Set Tables
The Cisco IOS software is available in different feature sets depending upon the platform. lists the feature sets for the Cisco AS2509-RJ and Cisco AS2511-RJ. lists the feature sets for the Cisco 2500 Fixed FRAD series.
Table 7 Cisco AS2500-RJ and Cisco AS2511-RJ Feature Sets
—
Basic
Basic
—
—
Basic
Basic
Basic
Basic
Basic
Basic
Basic
—
Basic
Basic
—
—
Basic
—
Basic
Basic
Basic
Basic
Basic
—
Basic
Basic
—
Basic
Basic
Basic
Basic
Basic
Basic
—
Basic
Basic
Basic
Basic
Basic
—
—
Basic
Basic
Basic
Basic
Basic
—
Basic
Basic
Basic
—
Basic
Basic
Basic
Basic
Basic
Basic
—
—
Basic
Basic
Basic
Basic
—
Basic
—
Basic
—
Basic
Basic
Basic
Basic
Basic
Basic
Basic
—
Basic
Basic
—
Basic
—
Basic
—
Basic
Basic
Basic
Basic
—
Basic
Basic
Basic
—
Basic
Basic
Basic
Basic
Basic
—
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
—
Basic
—
Basic
—
Basic
—
Basic
—
Basic
Basic
Basic
Basic
Basic
Basic
Basic
—
Basic
Basic
Basic
Basic
Basic
Basic
—
Basic
—
Basic
—
Basic
—
—
Basic
—
Basic
—
Basic
—
—
—
—
—
Basic
—
Basic
—
Basic
—
Basic
—
via local acknowledgmentBasic
—
Basic
—
Basic
—
—
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
Basic
—
Basic
—
Basic
—
Basic
—
Basic
Basic
—
Basic
Basic
Basic
—
Basic
1 Includes AppleTalk load balancing.
2 IRB supports IP, IPX, and AppleTalk; it is supported for transparent bridging, but not for SRB; it is supported on all media-type interfaces except X.25 and ISDN bridged interfaces; and IRB and concurrent routing and bridging (CRB) cannot operate at the same time.
3 Translational bridging is fast switched, but this can be disabled.
4 ISDN support includes calling line identification (ANI), X.25 over the B channel, ISDN subaddressing, and applicable WAN optimization features.
5 PPP includes support for LAN protocols supported by the feature set, address negotiation, PAP and CHAP authentication, PPP compression, and Multilink PPP.
6 X.25 includes X.25 switching.
7 Bandwidth-on-demand means two B-channel calls to the same destination.
8 IPX header compression (RFC 1553) is available in the feature sets that support IPX.
9 X.25 and Frame Relay payload compression.
10 BGP4 includes soft configuration, multipath support, and prefix filtering with inbound route maps.
11 RMON events and alarms are supported on all interfaces.
12 TACACS+ Single Connection and TACACS+ SENDAUTH enhancements are supported.
13 Cisco IOS Release 11.2 introduces several DLSw+ enhancements available in the Plus, Plus 40, and Plus 56 feature sets.
14 SRB/RSRB is fast switched. This enhancement is on by default, but can be disabled.
15 Remote node and terminal services supported on access servers (with limited support on router auxiliary ports).
16 IPX header compression (RFC 1553) is available in the feature sets that support IPX.
17 Use of LAT requires terminal license (FR-L8-10.X= or FR-L16-10.X=).
Table 8 Cisco 2500 Fixed FRAD Series
LAN FRAD1X
—
—
—
X
X
—
—
—
—
X
X
X
X
X
X
X
X
—
X
X
—
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
—
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
—
—
X
X
X10
X
X
X10
X
X
X
X
X
X
X
—
X
X
—
X
X
—
X
X
X
X
X
X
X
—
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
—
—
X
X
X
X
X
X
X
X
X
via local acknowledgmentX
X
X
—
X
X
—
X
X
1 The OSPF LANFRAD feature set for the Cisco 2500 Fixed FRAD routers is available in Release 11.2(6)P and later.
2 Includes AppleTalk load balancing.
3 IRB supports IP, IPX, and AppleTalk; it is supported for transparent bridging, but not for SRB; it is supported on all media-type interfaces except X.25 and ISDN bridged interfaces; and IRB and concurrent routing and bridging (CRB) cannot operate at the same time.
4 The Novell IPX feature includes display SAP by name, IPX Access Control List violation logging, and plain-English IPX access lists.
5 Translational bridging is fast switched, but this can be disabled.
6 PPP includes support for LAN protocols supported by the feature set, address negotiation, PAP and CHAP authentication, PPP compression, and Multilink PPP.
7 IPX header compression (RFC 1553) is available in the feature sets that support IPX.
8 X.25 and Frame Relay payload compression.
9 BGP4 includes soft configuration, multipath support, and prefix filtering with inbound route maps.
10 Enhanced IGRP in the OSPF LANFRAD feature set is only available in Release 11.2(4). Cisco does not support this functionality in any releases of the OSPF LANFRAD feature set, and this feature is subject to removal without notice.
11 RMON events and alarms is supported on all interfaces.
12 TACACS+ Single Connection and TACACS+ SENDAUTH enhancements are supported.
13 Cisco IOS Release 11.2 introduces several DLSw+ enhancements available in the Plus, Plus 40, and Plus 56 feature sets.
14 SRB/RSRB is fast switched. This enhancement is on by default, but can be disabled.
Upgrading to a New Software Release
If you are upgrading to Cisco IOS Release 11.2 from an earlier Cisco IOS software release, you should save your current configuration file before configuring your access server with the Cisco IOS Release 11.2 software. An unrecoverable error could occur during download or configuration.
Cisco IOS Upgrade Procedure
For instructions on downloading a current Cisco IOS release from the CCO Trivial File Transfer Protocol (TFTP) server, go to the following URL. (This URL is subject to change without notice.)
http://www.cisco.com/kobayashi/sw-center
The Software Center window is displayed.
Step 1
Step 2
Step 3
Step 4
•
•
•
Step 5
Step 6
Step 7
Memory Requirements
through describe the memory requirements for each Cisco 2500 series platform feature set supported by Cisco IOS Release 11.2.
Table 9 Release 11.2 Minimum Memory Requirements for the Cisco 2500 Series Routers
IP Set
8 MB
4 MB
Flash
IP Plus1 Set
8 MB
4 MB
Flash
IP Plus 40 Set
8 MB
4 MB
Flash
IP Plus 56 Set
8 MB
4 MB
Flash
IP/IPX/IBM/APPN Set
8 MB
8 MB
Flash
IP/IPX/AT/DEC Set
8 MB
4 MB
Flash
IP/IPX/AT/DEC Plus Set
8 MB
4 MB
Flash
IP/IPX/AT/DEC Plus 40 Set
8 MB
4 MB
Flash
IP/IPX/AT/DEC Plus 56 Set
8 MB
4 MB
Flash
Enterprise Set
8 MB
6 MB
Flash
Enterprise Plus Set
8 MB
6 MB
Flash
Enterprise Plus 40 Set
8 MB
6 MB
Flash
Enterprise Plus 56 Set
8 MB
6 MB
Flash
Enterprise/APPN Plus Set
16 MB
8 MB
Flash
Enterprise/APPN Plus 40 Set
16 MB
8 MB
Flash
Enterprise/APPN Plus 56 Set
16 MB
8 MB
Flash
Cisco Frame Relay Access
Device (CFRAD) Set4 MB
4 MB
Flash
Remote Access Server
8 MB
4 MB
Flash
ISDN Set
8 MB
4 MB
Flash
LAN FRAD Set
4 MB
4 MB
Flash
OSPF LANFRAD Set2
4 MB
4 MB
Flash
IP Set
8 MB
4 MB
Flash
IP Set
8 MB
4 MB
Flash
Remote Access Server
8 MB
4 MB
Flash
Flash
Memory
MemoryRelease 11.2 P Runs from
IP Set
8 MB
4 MB
Flash
1 Plus for the Cisco 2500 series includes NAT, RMON, and IBM (if IBM is not already included).
2 The OSPF LANFRAD feature set is available in Release 11.2(4) and later.
Table 10 Cisco AS2509-RJ and Cisco AS2511-RJ—Memory Requirements
Flash
Memory
MemoryIP
8 MB
4 MB
Flash
Remote Access Server
8 MB
4 MB
Flash
1 When a system is running from Flash memory, you cannot update the system while it is running. You must use the Flash load helper.
Table 11 Cisco 2500 Fixed FRAD Series—Memory Requirements
Flash
Memory
MemoryCFRAD
4 MB
4 MB
Flash
LAN FRAD
4 MB
4 MB
Flash
OSPF LAN FRAD
4 MB
4 MB
Flash
1 When a system is running from Flash memory, you cannot update the system while it is running. You must use the Flash load helper.
Caveats for Release 11.2(1) Through 11.2(12)
Possibly unexpected behavior in Cisco IOS Release 11.2 exists in the following areas:
•
•
•
•
•
•
•
•
•
•
A complete list of the caveats, including descriptions and possible workarounds, is available on the Documentation CD-ROM and on CCO:
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Caveats for Release 11.2(1) Through 11.2(11)
Possibly unexpected behavior in Cisco IOS Release 11.2 exists in the following areas:
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A complete list of the caveats, including descriptions and possible workarounds, is available on the Documentation CD-ROM and on CCO:
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Caveats for Release 11.2(1) Through 11.2(10)
Possibly unexpected behavior in Cisco IOS Release 11.2 exists in the following areas:
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A complete list of the caveats, including descriptions and possible workarounds, is available on the Documentation CD-ROM and on CCO:
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Caveats for Release 11.2(1) Through 11.2(9)
Possibly unexpected behavior in Cisco IOS Release 11.2 exists in the following areas:
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A complete list of the caveats, including descriptions and possible workarounds, is available on the Documentation CD-ROM and on CCO:
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Caveats for Release 11.2(1) Through 11.2(8)
Possibly unexpected behavior in Cisco IOS Release 11.2 exists in the following areas:
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A complete list of the caveats, including descriptions and possible workarounds, is available on the Documentation CD-ROM and on CCO:
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Caveats for Release 11.2(1) Through 11.2(7)
Possibly unexpected behavior in Cisco IOS Release 11.2 exists in the following areas:
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A complete list of the caveats, including descriptions and possible workarounds, is available on the Documentation CD-ROM and on CCO:
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Caveats for Release 11.2(1) Through 11.2(6)
Possibly unexpected behavior in Cisco IOS Release 11.2 exists in the following areas:
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A complete list of the caveats, including descriptions and possible workarounds, is available on the Documentation CD-ROM and on CCO:
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Caveats for Release 11.2(1) Through 11.2(5)
Possibly unexpected behavior in Cisco IOS Release 11.2 exists in the following areas:
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A complete list of the caveats, including descriptions and possible workarounds, is available on the Documentation CD-ROM and on CCO:
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Caveats for Release 11.2(1) Through 11.2(4)
Possibly unexpected behavior in Cisco IOS Release 11.2 exists in the following areas:
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A complete list of the caveats, including descriptions and possible workarounds, is available on the Documentation CD-ROM and on CCO:
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Caveats for Release 11.2(1) Through 11.2(3)
Possibly unexpected behavior in Cisco IOS Release 11.2 exists in the following areas:
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A complete list of the caveats, including descriptions and possible workarounds, is available on the Documentation CD-ROM and on CCO:
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Cisco Connection Online
Cisco Connection Online (CCO) is Cisco Systems' primary, real-time support channel. Maintenance customers and partners can self-register on CCO to obtain additional information and services.
Available 24 hours a day, 7 days a week, CCO provides a wealth of standard and value-added services to Cisco's customers and business partners. CCO services include product information, product documentation, software updates, release notes, technical tips, the Bug Navigator, configuration notes, brochures, descriptions of service offerings, and download access to public and authorized files.
CCO serves a wide variety of users through two interfaces that are updated and enhanced simultaneously: a character-based version and a multimedia version that resides on the World Wide Web (WWW). The character-based CCO supports Zmodem, Kermit, Xmodem, FTP, and Internet e-mail, and it is excellent for quick access to information over lower bandwidths. The WWW version of CCO provides richly formatted documents with photographs, figures, graphics, and video, as well as hyperlinks to related information.
You can access CCO in the following ways:
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For a copy of CCO's Frequently Asked Questions (FAQ), contact cco-help@cisco.com. For additional information, contact cco-team@cisco.com.
Note
Documentation CD-ROM
Cisco documentation and additional literature are available in a CD-ROM package, which ships with your product. The Documentation CD-ROM, a member of the Cisco Connection Family, is updated monthly. Therefore, it might be more current than printed documentation. To order additional copies of the Documentation CD-ROM, contact your local sales representative or call customer service. The CD-ROM package is available as a single package or as an annual subscription. You can also access Cisco documentation on the World Wide Web at http://www.cisco.com, http://www-china.cisco.com, or http://www-europe.cisco.com.
If you are reading Cisco product documentation on the World Wide Web, you can submit comments electronically. Click Feedback in the toolbar, select Documentation, and click Enter the feedback form. After you complete the form, click Submit to send it to Cisco. We appreciate your comments.
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