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Other Hardware Supported
The system supports all cardspreviously supported by the Cisco IOS Software on the Catalyst 6000 Family Supervisor, with
the exception of FlexWan (WS-X6182-2PA), which is not supported with the Supervisor Engine 2 in this release.
Software Features
MEM-DFC-512MB
MEM-DFC-512MB=
512-MB DRAM option for DFC
Spare
WS-6816-GBIC
WS-6816-GBIC=
Dual serial channel to the switch fabric with DFC installed
Spare
MEM-MSFC2-256MB
MEM-MSFC2-256MB=
MSFC2 256-MB memory option
Spare
MEM-MSFC2-512MB
MEM-MSFC2-512MB=
MSFC2 memory option 512 MB
Spare
Feature Description
Cisco IOS Software
runningon DFC to provide
dCEF support
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.
Support for redundant
fabrics; detects failing
fabric and switchover of
all line cards
High-speed redundant crossbar fabric failover is transparent
Support for redundant
supervisors
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.
Shared-tree multicast
forwarding (*,G) support
in hardware
Supports hardware switching of shared-tree multicast traffic in Protocol Independent
Multicast (PIM) sparse mode.
Distributed multicast
switching support with
DFC
Multicast replication can be done on each of the DFCs rather than on the central forwarding
engine.
Policy-based routing
support in hardware
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.
TCP intercept support in
hardware
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.
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