Supervisor Engine 2,256 MB of DRAM, dual 1000BASEX Gigabit Interface Converter (GBIC) uplinks, fabric-enabled1, Cisco Express Forwarding (CEF), enhanced quality-of-service (QoS) features, Policy Feature Card 2 (PFC2), and MSFC2. Factory ships with 256 MB on Supervisor 2 and 256 MB of DRAM on MSFC2

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Supervisor Engine 2, dual 1000BASEX GBIC uplinks, fabric-enabled1, CEF, enhanced QoS features, PFC2, and MSFC2.MSFC2 Requires 256 MB of DRAM to run 12.1(5)EX

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256-Gbps Switch Fabric Module to support fabric-enabled modules

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16-port Gigabit Ethernet GBIC Switching Module, fabric-enabled

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Distributed forwarding card (DFC)

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256-MB DRAM option for DFC

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512-MB DRAM option for DFC

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Dual serial channel to the switch fabric with DFC installed

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MSFC2 256-MB memory option

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MSFC2 memory option 512 MB

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Supervisor Engine 2 and PFC2 provide IP unicast and IP multicast Layer 3 switching with CEF implemented on the PFC2. DFCs on line cards provide local IP unicast and IP multicast Layer 3 switching with CEF.

High-speed redundant crossbar fabric failover is transparent

Supervisor redundancy is supported via Enhanced High System Availability (EHSA). A supervisor recovery requires the standby supervisor to first reset all line cards; in this case, a recovery takes from 30 to 90 seconds (configuration dependent). In addition, currently redundant MSFCs in a system cannot employ the Hot Standby Resource Protocol (HSRP) between the MSFCs. However, the primary MSFC can run HSRP with an external router; the standby MSFC becomes primary in the event of a failure.

Supports hardware switching of shared-tree multicast traffic in Protocol Independent Multicast (PIM) sparse mode.

Multicast replication can be done on each of the DFCs rather than on the central forwarding engine.

If a route-map match clause contains the next-hop option only, packets are switched in hardware. In this case, all the packets, including the first packets, are switched in hardware. Line-rate performance is achieved in this case.

If a route-map match clause contains the length option and a set clause contains options such as precedence or default, next-hop packets are switched by the MSFC.

Feature is supported with hardware assistance by use of the multilayer switching (MLS) cache.

SYN/FIN/RST packets are sent to the MSFC and switched in software. An MLS entry is established after switching the first data (non syn/fin/rst) packet in software. All subsequent packets are switched in hardware.

Supervisor 2 uses the NetFlow table for dynamic reflexive access control list (ACL) entries; this allows better ternary content addressable memory (TCAM) usage for other ACLs.

Limits the rate at which packets reach the router for packets sent to a destination in a connected network. Most of these packets are dropped; a small number are sent to the router (rate limited). This can help prevent denial-of-service (DOS) attacks.

The Cisco IOS Software unicast RPF feature is supported in hardware on the PFC2.

Sources and hosts that can be reached via multiple paths are forwarded to the MSFC2.

For ACL-based RPF checks, traffic that matches the RPF ACL is forwarded to the MSFC2.

Web Cache Communication Protocol (WCCP) Layer 2 PFC Redirection with Supervisor Engine 2 and PFC2. This capability allows directly connected Cisco Cache Engines to use Layer 2 redirection, which is more efficient than Layer 3 redirection via generic routing encapsulation (GRE) encapsulation. A directly connected Cache Engine can be configured to negotiate use of the WCCP Layer 2 PFC Redirection feature.

Support for a two-level policing mechanism that allows two markdown thresholds or one markdown threshold and a drop threshold.

Source Specific Multicast (SSM) is an extension of the IP Multicast protocol. SSM enables a receiving client, after it has learned about a particular multicast source through a directory service, such as a Web server, to then receive content directly from the source, rather than receiving it using a shared rendezvous point (RP) in PIM Sparse Mode.

To enable timely deployment of SSM services in the face of non-SSM-enabled receiver applications or receiver host operating systems, Internet Group Management Protocol Version 3 (IGMPv3) also provides URL Rendevous Directory (URD) as an interim solution to signal source-specific membership:

URD is the designated transition solution for content providers that want to use SSM-enabled receiver applications. URD enables existing applications to be SSM capable without modifying any receiver host software (application nor operating system) provided that the application is started via a Web browser. URD relies on the last-hop router towards a SSM receiver host to intercept URLs from a Web server to detect the source address of the SSM channel.

Because IGMPv3 standards are not yet final, customers can use SSM using IGMPv3 Lite. IGMPv3 Lite includes software for hosts that provides a subset of proposed functions for the IGMPv3 application programming interface (API) required to write SSM applications.

ISLB is enhanced to work with dCEF.

Catalyst 6000 SUP2/MSFC2 IOS ENTERPRISE W/VIP

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c6sup22-jsv-mz.121-5.EX

Catalyst 6000 SUP2/MSFC2 IOS ENTERPRISE W/VIP SSH 3DES

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c6sup22-jk2sv-mz.121-5.EX

Catalyst 6000 SUP2/MSFC2 IOS DESKTOP W/VIP

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c6sup22-dsv-mz.121-5.EX

Catalyst 6000 SUP2/MSFC2 IP/IPX W/VIP

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c6sup22-dsv-mz.121-5.EX

Catalyst 6000 SUP2/MSFC2 IOS SERVICE PROVIDER W/VIP

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c6sup22-psv-mz.121-5.EX

Catalyst 6000 SUP2/MSFC2 IOS Service Provider W/VIP SSH 3DES

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c6sup22-pk2sv-mz.121-5.EX