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62 SHOW IP ADVERTISE Patch Release Note
Patch 86251-08 for Software Release 2.5.1
C613-10356-00 REV I
SHOW IP ICMPREPLY
Syntax SHOW IP ICMPREPLY
Description This command display the status of configurable ICMP messages (Figure
Figure 4: Example output from the SHOW IP ICMPREPLY command:
Static IGMP
This section describes an enhancement to the Internet Group Management
Protocol (IGMP), which is supplied as a patch on Software Releases 2.5.1 for
Rapier i Series switches.
It is possible to have a network segment that either has no multicast group
members, or has a host that is unable to report its group membership with
IGMP. In such cases, no multicast traffic is sent to the network segment. This
enhancement provides a mechanism for the user to pull down multicast traffic
to the segment.
Currently the switch forwards multicast data on a dynamic basis to hosts who
have joined the multicast group. This enhancement allows the user to instruct
the switch to forward multicast data over a specified interface and port, as
shown in Figure 6 on page 63. This capability is essential for sending multicast
traffic to hosts that cannot report their group membership with IGMP. It plays
an important role in video over ADSL applications.
Figure 6 on page 63 illustrates a switch forwarding the multicast stream to a
set-top box after a user specifies that group 224.1.1.1 multicast data should be
forwarded out of port 4 of VLAN1.
Unlike conventional IGMP membership, this user-specified static membership
never times out.
The user will also be able to filter some IGMP debug messages by source IP
address and group destination address.
SHOW IP ICMP REPLY MESSAGES
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ICMP REPLY MESSAGES:
Network Unreachable ................ disabled
Host Unreachable ................... disabled
Redirect ........................... enabled
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Table 5: Parameters in the output of the SHOW IP ICMPREPLY command.
Parameter Meaning
ICMP Reply Messages A list of ICMP configurable reply messages and whether
they are enabled or disabled.