Table of Contents
Note For the Supervisor Engine 8-E to support IOS XE 3.6.0E, the ROMMON version must be upgraded to 15.1(1r)SG4. (Refer to Upgrading the System Software).
Cisco IOS XE 3.6.0E is a feature rich new software feature release for IOS and IOS-XE based Catalyst Access Switching products (Cat4500E/X, 3850/3650, 3K-X, Cat2K and 2K/3K Compact switches) which brings new innovations for Converged Access in wired and wireless topologies, IT Simplicity, Application Experience, and Mobility. This release will provide long-lived extended maintenance with planned rebuilds. It will also have all the Govt. certifications for IOS-XE and currently shipping IOS platforms.
Support for Cisco IOS XE Release 3.6.0E follows the standard Cisco Systems® support policy, available at
For more information on the Catalyst 4500E series switches, visit the following URL:
Note Although this release note and those for the Catalyst 4900M, Catalyst 4948E, Catalyst 4948E-F Series Switches, Catalyst 4500 Series Switches, and the Catalyst 4500-X Series Switches differ, each leverages the same Software Configuration Guide, Command Reference Guide, and System Message Guide.
The IP Base image supports Open Shortest Path First (OSPF) for Routed Access, Enhanced Interior Gateway Routing Protocol (EIGRP) "limited" Stub Routing, Nonstop Forwarding/Stateful Switchover (NSF/SSO), and RIPv1/v2. The IP Base image does not support enhanced routing features such as BGP, Intermediate System-to-Intermediate System (IS-IS), Full OSPF, Full Enhanced Interior Gateway Routing Protocol (EIGRP) & Virtual Routing Forwarding (VRF-lite).
The LAN Base image complements the existing IP Base and Enterprise Services images. It is focused on customer access and Layer 2 requirements and therefore many of the IP Base features are not required. The IP upgrade image is available if at a later date you require some of those features
IOS XE 3.2.xSG is an active maintenance train that supports Sup7E only. IOS XE 3.4.xSG is a maintenance train supporting Sup7E and Sup7L-E. IOS XE 3.6.xSG is a maintenance train supporting Sup7E, Sup7L-E and Sup8-E. IOS XE 3.6.xE, 3.4.xSG, and 3.2.xSG are extended maintenance (EM) releases. IOS XE 3.5.xE and 3.3.0SG are standard releases (SM).
Figure 1 displays the release strategy.
Support for Cisco IOS Software Release XE 3.6.0E follows the standard Cisco Systems® support policy, available at
- Supported Hardware on the Catalyst 4500E Series Switch
- Supported E Series Hardware on Cisco IOS XE Release 3.6.0E
- Feature Support by Image Type
- MIB Support
- Features Not Supported on the Cisco Catalyst 4500E Series Switch
- Orderable Product Numbers
Table 1 lists the hardware supported on the Catalyst 4500E Series Switch.
CWDM small form-factor pluggable module (See Table 2 for a list of supported wavelengths.)
CWDM gigabit interface converter (See Table 2 for a list of supported wavelengths.)
Table 2 briefly describes the supported CWDM wavelengths in the Catalyst 4500E Series Switch.
Table 3 briefly describes the supported DWDM wavelengths in the Catalyst 4500E Series Switch.
A brief list of primary E-Series hardware supported by Cisco IOS XE Release 3.6.0E is shown in Table 4 .
Table 5 is a detailed list of features supported on Catalyst 4500E Supervisor Engine 7-E, Supervisor Engine 7L-E, and Supervisor Engine 8-E running Cisco IOS XE Software Release 3.6.0E categorized by image type. Please visit Feature Navigator for package details:
Source and Prefix Guard3
IPv6 Policy-Based Routing4
OSPF for Routed Access6
Time Domain Reflectometry (TDR)7
3.When either Source or Prefix Guard for IPv6 is enabled, ICMPv6 packets are unrestricted on all Catalyst 4500 series switch platforms running IOS Cisco Release 15.2(1)E. All other traffic types are restricted.
- New Hardware Features in Release IOS XE 3.6.2E
- New Hardware Features in Release IOS XE 3.6.0E
- New Software Features in Release IOS XE 3.6.1E
- New Software Features in Release IOS XE 3.6.0E
- New passive CX1 assemblies: SFP-H10GB-CU1-5M, SFP-H10GB-CU2M, SFP-H10GB-CU2-5M
- Support for SFP-H10GB-ACU7M, SFP-H10GB-ACU10M (active CX1 cable assemblies)
- Support of breakout cable on the 10 GbE end for: QSFP-4SFP10G-CU1M, QSFP-4SFP10G-CU3M, QSFP-4SFP10G-CU5M
- Support for Cisco SFP+ Active Optical Cables - Cisco SFP-10G-AOC1M Cisco SFP-10G-AOC2M Cisco SFP-10G-AOC3M, Cisco SFP-10G-AOC5M, Cisco SFP-10G-AOC7M, Cisco SFP-10G-AOC10M
- WS-X4748-SFP-E,WS-X4724-SFP-E,WS-X4712-SFP-E (support for Sup8E)
Determines the level of network access provided to an endpoint based on the type of the endpoint device. This feature also permits hardbinding between the end device and the interface. Autoconfig falls under the umbrella of Smart Operations solution.
Banner Page and Inactivity timeout for HTTP/S connections—Allows you to create a banner page and set an inactivity timeout for HTTP or HTTP Secure (HTTPS) connections. The banner page allows you to logon to the server when the session is invalid or expired.
Enhances the functionality of Cisco TrustSec with SXP version 4 by adding support for Security Group Tag (SGT) Exchange Protocol (SXP) bindings that can be propagated in both directions between a speaker and a listener over a single connection.
Allows users to configure multiple non-link local addresses as virtual addresses. The Hot Standby Router Protocol (HSRP) ensures host-to-router resilience and failover, in case the path between a host and the first-hop router fails, or the first-hop router itself fails.
Provides a mechanism to configure multiple commands at the same time and associate it with a target such as an interface. An interface template is a container of configurations or policies that can be applied to specific ports
Allows you to manually configure how the received packets should be routed. PBR allows you to identify packets by using several attributes and to specify the next hop or the output interface to which the packet should be sent.
In-Service Software Upgrade8
Provides the capability to diagnose Media Stream on top of various instrumentations in Cisco routers/switches and endpoints. Also addresses the MediaNet Video monitoring requirement to discover the signaling path and provides end-to-end diagnostics along the media stream routes.
Controls and manages the Cisco TrustSec access control on a network device based on an attribute-based access control list. When a security group access control list (SGACL) is enabled globally, the SGACL is enabled on all interfaces in the network by default; use Security Group ACL at Interface Level feature to disable the SGACL on a Layer 3 interface.
Ensures that the Network Device Admission Control (NDAC)-authenticated 802.1X links between Cisco TrustSec devices are in open state even when the Authentication, Authorization, and Accounting (AAA) server is not reachable.
Allows you to track the behavior of an object and receive notifications of changes. This feature explains how object tracking, in particular the tracking of IPv6 objects, is integrated into VRRP version 3 (VRRPv3) and describes how to track an IPv6 object using a VRRPv3 group.
As Table 7 shows, each version of Cisco IOS XE has an associated Cisco IOS version:
If you are upgrading to Cisco IOS XE Version 3.5.0E and plan to use VSS, you must upgrade your ROMMON to version 15.0(1r)SG10. Otherwise, you must upgrade your ROMMON to at least IOS Version 15.0(1r)SG2.
When supervisor engine 1 (sup1) is in ROMMON and supervisor engine 2 (sup2) is in IOS, only sup2 can read the idprom contents of chassis’ idprom. Chassis type is displayed as “+E” in the output of the show version command. Conversely, sup1 can only display the chassis type as “E.”
- The show exception files all command lists only crashinfo files from the active supervisor engine. You must issue the dir slavecrashinfo: and dir slvecrashinfo-dc: commands to obtain lists of crashinfo files from the standby supervisor engine.
- Performing an ISSU from a prior release to IOS XE 3.6.0E is unsupported.
- The WS-X4712-SFP+E module is not supported in the WS-C4507R-E or WS-C4510R-E chassis and does not boot. This module is supported in the WS-C4503-E, WS-C4506-E, WS-C4507R+E, and WS-C4510R+E chassis.
- More than 16K QoS policies can be configured in software. Only the first 16K are installed in hardware.
- Adjacency learning (through ARP response frames) is restricted to roughly 1000 new adjacencies per second, depending on CPU utilization. This should only impact large networks on the first bootup. After adjacencies are learned they are installed in hardware.
- Multicast fastdrop entries are not created when RPF failure occurs with IPv6 multicast traffic. In a topology where reverse path check failure occurs with IPv6 multicast, this may cause high CPU utilization on the switch.
- The SNMP ceImageFeature object returns a similar feature list for all the three license levels (LAN Base, IP Base, and EntServices). Although the activated feature set for a universal image varies based on the installed feature license, the value displayed by this object is fixed and is not based on the feature license level.
- Standard TFTP implementation limits the maximum size of a file that can be transferred to 32 MB. If ROMMON is used to boot an IOS image that is larger than 32 MB, the TFTP transfer fails at the 65,xxx datagram.
TFTP numbers its datagrams with a 16 bit field, resulting in a maximum of 65,536 datagrams. Because each TFTP datagram is 512 bytes long, the maximum transferable file is 65536 x 512 = 32 MB. If both the TFTP client (ROMMON) and the TFTP server support block number wraparound, no size limitation exists.
Cisco has modified the TFTP client to support block number wraparound. So, if you encounter a transfer failure, use a TFTP server that supports TFTP block number wraparound. Because most implementations of TFTP support block number wraparound, updating the TFTP daemon should fix the issue.
The outputs of certain commands, such as show ip route and show access-lists, contain non-deterministic text. While the output is easily understood, the output text does not contain strings that are consistently output. A general purpose specification file entry is unable to parse all possible output.
While a general purpose specification file entry may not be possible, a specification file entry might be created that returns the desired text by searching for text that is guaranteed to be in the output. If a string is guaranteed to be in the output, it can be used for parsing.
Request the output of the show running-config command using NETCONF and parse that output for the desired strings. This is useful when the desired lines contain nothing in common. For example, the rules in this access list do not contain a common string and the order (three permits, then a deny, then another permit), prevent the spec file entry from using permit as a search string, as in the following example:<X-Interface> permit 0000.0000.ffef ffff.ffff.0000 0000.00af.bcef ffff.ff00.0000 appletalk</X-Interface>
- When attaching a existing policy-map (that is already applied to a control-port) to another front-panel port, the following message displays:The policymap <policy-map name> is already attached to control-plane and cannot be shared with other targets.
- If the number of unique FNF monitors attached to target exceeds 2048 (one per target), a switch responds slowly:
- ciscoFlashPartitionFileCount object returns an incorrect file count for bootflash:, usb0:, slot0:, slaveslot0:, slavebootflash:, and slaveusb0:.
- If multicast is configured and you make changes to the configuration, Traceback and CPUHOG messages are displayed if the following conditions exist:
- With traffic running, entering clear ip mroute * with larger number of mroutes and over 6 OIFs will cause Malloc Fail messages to display.
- Although you can configure subsecond PIM query intervals on Catalyst 4500 platforms, such an action represents a compromise between convergence (reaction time) and a number of other factors (number of mroutes, base line of CPU utilization, CPU speed, processing overhead per 1 m-route, etc.). You must account for those factors when configuring subsecond PIM timers. We recommend that you set the PIM query interval to a minimum of 2 seconds. By adjusting the available parameters, you can achieve flawless operation; that is, a top number of multicast routes per given convergence time on a specific setup.
- Energywise WOL is not “waking up” a PC in hibernate or standby mode.
- When either the RADIUS-server test feature is enabled or RADIUS-server dead-criteria is configured, and either RADIUS-server deadtime is set to 0 or not configured, the RADIUS-server status is not properly relayed to AAA.
- While configuring an IPv6 access-list, if you specify hardware statistics as the first statement in v6 access-list mode (i.e. before issuing any other v6 ACE statement), it will not take effect. Similarly, your hardware statistics configuration will be missing from the output of the show running command.
- Routed packets that are fragmented are not policed if the egress interface is on the VSS Standby switch. However, if the egress interface is on the VSS Active switch, these packets are policed.
- When an IPv6 FHS policy is applied on a VLAN and an EtherChannel port is part of that VLAN, packets received by EtherChannel (from neighbors) are not bridged across the local switch.
- During VSS conversion, the switch intended as the Standby device may require up to 9 minutes to reach an SSO state. The boot up time depends on the configuration and on the number of line cards in the system.
- Dual connectors (like, an SFP+ transceiver inserted into a CVR-X2-SFP10G module) on the WS-X4606-X2-E line card are not supported as a VSL.
- Beginning with IOS Release XE 3.5.0E, error messages that occur when a QoS policy is applied will no longer appear directly on the console when no logging console is configured. They will appear only when a logging method is active (e.g., logging buffered, logging console, …).
- Auto negotiation cannot be disabled on the Fa1 port. It must be set to auto/auto, or fixed speed with duplex auto.
- The following messages are seen during boot up after POST check.Aug 8 20:30:29 %IOSXE-3-PLATFORM: process kernel: mmc0: Got command interrupt 0x00030000 even though no command operation was in progress.
Note For the latest information on PSIRTS, refer to the Security Advisories on CCO at the following URL:
The Bug Search Tool (BST), which is the online successor to Bug Toolkit, is designed to improve the effectiveness in network risk management and device troubleshooting. The BST allows partners and customers to search for software bugs based on product, release, and keyword, and aggregates key data such as bug details, product, and version. The tool has a provision to filter bugs based on credentials to provide external and internal bug views for the search input.
1. Access the BST (use your Cisco user ID and password) at https://tools.cisco.com/bugsearch/.
- For information about individual switching modules and supervisors, refer to the Catalyst 4500 Series Module Installation Guide at:
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