Clearing The Source Active Cache; Clearing Msdp Statistics; Dvmrp Overview - Dell PowerConnect B-RX Configuration Manual

BigIron RX# clear ip msdp peer 205.216.162.1
Remote connection closed
Syntax: clear ip msdp peer <ip-addr>
The command in this example clears the MSDP peer connection with MSDP router 205.216.162.1.
The CLI displays a message to indicate when the connection has been successfully closed.

Clearing the source active cache

To clear the entries from the Source Active cache, enter the following command at the Privileged
EXEC level of the CLI.
BigIron RX# clear ip msdp sa-cache
Syntax: clear ip msdp sa-cache [<source-addr> | <group-addr>]
The command in this example clears all the cache entries. Use the <source-addr> parameter to
clear only the entries for a specified course. Use the <group-addr> parameter to clear only the
entries for a specific group.

Clearing MSDP statistics

To clear MSDP statistics, enter the following command at the Privileged EXEC level of the CLI.
BigIron RX# clear ip msdp statistics
Syntax: clear ip msdp statistics [<ip-addr>]
The command in this example clears statistics for all the peers. To clear statistics for only a specific
peer, enter the peer's IP address.

DVMRP overview

The BigIron RX provides multicast routing with the Distance Vector Multicast Routing Protocol
(DVMRP) routing protocol. DVMRP uses IGMP to manage the IP multicast groups.
DVMRP is a broadcast and pruning multicast protocol that delivers IP multicast datagrams to its
intended receivers. The receiver registers the interested groups using IGMP. DVMRP builds a
multicast delivery tree with the sender forming the root. Initially, multicast datagrams are delivered
to all nodes on the tree. Those leaves that do not have any group members send prune messages
to the upstream router, noting the absence of a group. The upstream router maintains a prune
state for this group for the given sender. A prune state is aged out after a given configurable
interval, allowing multicasts to resume.
DVMRP employs reverse path forwarding and pruning to keep source specific multicast delivery
trees with the minimum number of branches required to reach all group members. DVMRP builds a
multicast tree for each source and destination host group.
BigIron RX Series Configuration Guide
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DVMRP overview
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