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70
AT-8700XL Series Switch User Guide
Software Release 2.6.1
C613-02030-00 REV B
Routing Information Protocol (RIP)
Routing protocols such as RIPv1 and RIPv2 can be enabled on a VLAN. For
example, to enable RIPv2 on the admin VLAN, use the command:
ADD IP RIP INTERFACE=vlan11 SEND=RIP2 RECEIVE=BOTH
To display information about RIP (Figure on page 70), use the command:
SHOW IP RIP
Example output from the SHOW IP RIP command.
IGMP Snooping
IGMP (
Internet Group Management Protocol
) is used by IP hosts to report their
multicast group memberships to routers and switches. IP hosts join a multicast
group to receive broadcast messages directed to the multicast group address.
IGMP is an IP-based protocol and uses IP addresses to identify both the
multicast groups and the host members. For a VLAN-aware devices, this
means multicast group membership is on a per-VLAN basis. If at least one port
in the VLAN is a member of a multicast group, by default multicast packets
will be flooded onto all ports in the VLAN.
IGMP snooping
enables the switch to forward multicast traffic intelligently on
the switch. The switch listens to IGMP membership reports, queries and leave
messages to identify the switch ports that are members of multicast groups.
Multicast traffic will only be forwarded to ports identified as members of the
specific multicast group.
IGMP snooping is performed at Layer 2 on VLAN interfaces automatically. By
default, the switch will only forward traffic out those ports with multicast
listeners, therefore it will not act as a simple hub and flood all multicast traffic
out all ports. IGMP snooping is independent of the IGMP and Layer 3
configuration, so an IP interface does not have to be attached to the VLAN, and
IGMP does not have to be enabled or configured.
IGMP snooping is enabled by default. To disable it, use the command:
DISABLE IGMPSNOOPING
Interface Circuit/DLCI IP Address Send Receive Demand Auth Password
-------------------------------------------------------------------------------
vlan11 - - RIP2 BOTH NO NO
ppp0 - 172.16.249.34 RIP1 RIP2 YES PASS ********
-------------------------------------------------------------------------------
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