Cisco IOS Software Release 15.1(2)SY for Cisco Catalyst 6500 Series Switches
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Updated:September 12, 2013
Cisco IOS Software Release 15.1(2)SY supports Cisco Catalyst 6500 Series Supervisor Engine 2T and Cisco Catalyst 6500 Series Supervisor Engine 720 (Sup 720-3B and Sup 720-3C) continuing on the promise of one converged software image.
Release 15.1(2)SY introduces a new exciting solution called Catalyst Instant Access along with other features.
Some of the Highlights:
• Cisco Catalyst Instant Access feature drastically reduces network operational cost by providing single point of management, configuration and troubleshooting for your campus aggregation and access network with Catalyst 6500 series switches.
• Medianet Support on Supervisor 720 allows customers to deploy end-to-end video solution as part of Cisco Borderless solution with Supervisor 720. Customers can now use advanced features like performance-monitoring, mediatrace across their network using Catalyst 6500 Series Supervisors.
• Routing and Switching enhancement includes OSPFv3 Non-Stop Routing, EIGRPv6 Graceful Restart, Multicast only Fast Re-Route (MoFRR), IPv6 Multicast VRF-Lite, and IPv6 Multicast Virtual Private Network (MVPNv6).
• Cisco Service Discovery Gateway allows customer to effectively utilize local Layer 2 services such as Apple Bonjour services by allowing network devices (printers, monitors) to be accessed over Layer 3 boundaries.
• 15.1(2)SY on SUP720-3B or SUP720-10GE will not support WAN modules and SIP SPAs
For more details on unsupported cards in 15.1(2)SY, please see release notes.
Software Feature Highlights of Release 15.1(2)SY
® Instant Access is a solution that allows customers to dramatically simplify campus network operations. It simplifies operation through a single point of operation and management for campus access and backbone. The solution is composed of Cisco Catalyst 6500 or Catalyst 6800 (available in future) Series backbone switches and Cisco Catalyst 6800IA Series Switches (Instant Access).
The Cisco Catalyst 6800IA Series Switches operate like remote line cards and are physically connected by 10GE uplinks to the Cisco Catalyst 6500 or 6800 (available in future) Series. This allows Catalyst 6500/6800 features to be extended to the network access-layer e.g. BGP and MPLS/EVN.
This solution is optimized for wired devices with centralized wireless. The entire configuration works as a single extended switch with a single management domain.
In a traditional architecture, each device is managed separately. (Figure 1)
Figure 1. Traditional Access - 23 Switches to Manage
In the new Instant Access architecture, all the devices are managed as one device. (Figure 2)
Figure 2. Instant Access - Only 1 Switch to Manage
15.1(2)SY release introduces support for Cisco Catalyst 6800IA Series Switches as remote line card for Catalyst 6500 Supervisor Engine 2T. The 6800IA Series has the following 2 SKU's:
• C6800IA-48FPD provides 48 10/100/1000M downlink ports, and 2x 10G uplink ports with 740W of available inline power.
Campus network designs typically call for small broadcast and Layer 2 domains. It's common to separate wired and wireless access technologies onto different network segments Zeroconf network services, such as Apple Bonjour, are designed to work within a single Layer 2 domain and do not work over Layer 3 boundaries. And today's workers expect to have equivalent service visibility and connectivity both at home and in the office.
The Cisco Service Discovery Gateway based on multicast Domain Name Service (mDNS) provides a network-wide solution to overcome this challenge. The gateway allows Zeroconf service information to propagate over Layer 3 boundaries. This permits devices in one Layer 2 domain to discover services in a different Layer 2 domain. Users or administrators can easily manage which services are to be advertised or withdrawn on a particular segment by applying filters.
The Cisco Service Discovery Gateway helps to easily integrate devices on the network that provide or consume services - even if they are not connected to the same broadcast domain (and would not be able to see each other otherwise). The gateway allows efficient caching of services and can filter services based on criteria such as service type, instance name, or message type. It supports both IPv4 and IPv6 address spaces.
• Performance Monitor
Performance Monitor is a Cisco Medianet IOS Software feature that measures the performance of Real Time Protocol (RTP), TCP, and IP constant bit rate (CBR) traffic on network devices. Performance Monitor analyzes RTP based audio and video flows and reports on service affecting metrics like packet loss and network jitter. For TCP flows, Performance Monitor reports on round trip time and packet loss occurrences.
Hop-by-hop knowledge of these L4+ performance metrics along the network path leads to granular fault isolation and easier troubleshooting of user traffic flows.
Performance Monitor is already supported on Supervisor 2T and IOS Release 15.1(2)SY adds support for Performance Monitor on Supervisor 720.
With Mediatrace, a network node or endpoint discovers the network path that a particular existing flow is taking or the path that a new flow would take at this moment. As Mediatrace discovers the nodes it also collects real-time L4+ statistics from each of them.
Three possible levels of data collection are available:
– Hops: Mediatrace requests will collect only the network hops and the interfaces along that path.
– System: Adds collection of system health information for each of the network nodes, in addition to Hops information.
– Perf-Mon: The highest level. Adds collection of hop-by-hop flow specific information, collected by the performance-monitoring feature discussed earlier (loss, jitter and latency).
After the information is collected, the data is composed into a single report at the requesting node.
Mediatrace is already supported on Supervisor 2T and IOS Release 15.1(2)SY adds support for Mediatrace on Supervisor 720.
Metadata conveys explicit L4+ information about client application needs to the network. Metadata tags identify unique flows with the application and provision network resources for Metadata-based classification.
This makes a QoS policy "flow-aware" and allows users to apply different QoS policy actions to a specific flow or a group of flows. It allows users to easily classify flows via intuitive user-friendly metadata attributes, instead of traditional flow identifiers, such as IP or MAC address.
Metadata is already supported on Supervisor 2T and IOS Release 15.1(2)SY adds support for Metadata on Supervisor 720.
• OSPFv3 Non-Stop Routing
The OSPFv3 NSR feature allows a router with redundant Route Processors (RPs) to maintain its Open Shortest Path First (OSPF) version 3 state and adjacencies across planned and unplanned RP switchovers.
It does this by check-pointing state information from OSPFv3 on the active RP to the standby RP. Later, following an RP switchover to the standby RP, OSPFv3 can use this check-pointed information to continue operation without interruption.
The EIGRP IPv6 NSF/GR feature allows a Nonstop Forwarding (NSF)-aware device that is running Enhanced Interior Gateway Routing Protocol (EIGRP) to forward IPv6 packets along routes that are known to a device that is performing a switchover operation. EIGRP peers retain adjacencies and routes learned from a restarting peer (the device that is undergoing a switchover), and the EIGRP peers continue to forward IPv6 packets to the restarting peer. The high-availability systems on the device retain the forwarding table and continue to forward IPv6 packets until the control plane (EIGRP) has converged on the restarting device.
NSF allows forwarding of IPv6 packets while the device restarts after a failure. Graceful Restart (GR) allows topology databases to resynchronize while maintaining neighbor relationships and forwarding paths.
Multicast only Fast Re-Route (MoFRR) is an IP solution that minimizes packet loss in a network when there is a link or node failure. It works by making simple enhancements to multicast routing protocols like Protocol Independent Multicast (PIM).
MoFRR transmits a multicast join message from a receiver toward a source on a primary path, while also transmitting a secondary multicast join message from the receiver toward the source on a backup path.
Data packets are thus received from both the primary path and the secondary paths. The redundant packets are discarded at topology merge points due to Reverse Path Forwarding (RPF) checks.
When a failure is detected on the primary path, the repair is made simply by changing the interface on which packets are accepted to the secondary interface. Because the repair is local, it is fast (~200ms), greatly improving convergence times in the event of node or link failures on the primary path.
To provide IP multicast VPN services to customers with multiple distributed sites, service providers require a secure and scalable mechanism to transmit multicast traffic across the service provider network. Traditionally, IPv4 Multicast VPN (MVPN) provided such services, for IPv4 multicast traffic over a shared service provider backbone.
IPv6 Multicast Virtual Private Network (MVPNv6) provides the same services for IPv6 traffic, enabling service providers to provide multicast-enabled private IPv6 networks to their customers using their existing IPv4 back bone and the IPv4 and IPv6 VPN traffic are carried over the same tunnels simultaneously.
The IPv6 Multicast VRF Lite feature provides IPv6 multicast support for multiple virtual routing/forwarding contexts (VRFs). The scope of these VRFs is limited to the router in which the VRFs are defined.
This feature provides separation between routing and forwarding, providing an additional level of security because no communication between devices belonging to different VRFs is allowed unless it is explicitly configured.
The IPv6 Multicast VRF Lite feature simplifies the management and troubleshooting of traffic belonging to a specific VRF.
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