Configuration Guide User guide

FastIron Configuration Guide 1579
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Passive multicast route insertion
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 clear ip msdp sa-cache command at
the Privileged EXEC level of the CLI:
Brocade# 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 clear ip msdp statistics command at the Privileged EXEC level of
the CLI:
Brocade# 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 a specific
peer, enter the peer IP address.
Passive multicast route insertion
Passive Multicast Route Insertion (PMRI) enables a Layer 3 switch running PIM Sparse to create an
entry for a multicast route (e.g., (S,G)), with no directly attached clients or when connected to
another PIM router (transit network).
PMRI is critical for Service Providers wanting to deliver IP-TV services or multicast-based video
services. Service Providers, who have transit networks, distribute multicast-based video services to
other Service Providers, regardless of whether a client subscribes to a video service.
PMRI is enabled by default. To disable it, enter the following commands at the router pim level of
the CLI.
Brocade(config)#router pim
Brocade#(config-pim-router)#no hardware-drop
Syntax: [no] hardware-drop
When PMRI is enabled, the show ip pim mcache command output displays the multicast cache
entry along with a drop flag, indicating that the device is dropping packets in hardware. If the HW
flag is set to 1 (HW=1), it implies that the packets are being dropped in hardware. If the HW flag is
set to 0, (HW=0), it indicates that the packets are being processed in software. The following
shows an example display output.