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28 show igmpsnooping routeraddress Patch Release Note
Patch 89262-08 for Software Release 2.6.2
C613-10402-00 REV H
show igmpsnooping routeraddress
Syntax SHOW IGMPSNOOPING ROUTERADDRESS
Description This command displays information about the list of configured IP multicast
router addresses currently configured on the switch (Figure 2 on page 28).
Figure 2: Example output for the show ipmpsnooping routeraddress command.
ICMP Redirect Messages for IPv6
A new command has been added to enable the switch to issue ICMP redirect
messages for unicast IPv6 traffic, as recommended by RFC 2461 "Neighbor
Discovery for IP Version 6 (IPv6)". To enable the new function, use the
command:
ENABLE SWITCH ACCELERATOR FUNCTION=ICMPREDIRECT
The switch accelerator does not issue ICMP redirect messages. When
ICMPREDIRECT is enabled, any unicast IPv6 packet that has the same ingress
and egress VLAN is routed in software rather than hardware, and ICMP
redirect messages may be generated.
The purpose of an ICMP redirect is to replace layer 3 routing with layer 2
switching. On a layer 3 switch, switching and routing are both performed in
hardware, so ICMP redirects offer no performance improvement. The
ICMPREDIRECT function may impact performance in particular (unusual)
network configurations, and is not recommended for use in a general network
environment. The ICMPREDIRECT function is disabled by default.
To disable the ICMPREDIRECT function, use the command:
DISABLE SWITCH ACCELERATOR FUNCTION=ICMPREDIRECT
To see whether the function is enabled or disabled, use the command:
SHOW SWITCH ACCELERATOR
IGMP Snooping Router Address
----------------------------------------------------------------------------
IGMP Snooping Router Mode ...... IP
Router Address List
--------------------------------
224.0.0.4
224.0.0.6
224.0.0.80
224.0.0.43
224.0.0.23
224.0.0.15
224.0.0.60
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