Foundry Configuration Guide for the FESX, FSX, and FWSX
19 - 32 © Foundry Networks, Inc. December 2005
Configuration Syntax
To configure the device to drop PIM traffic in hardware, enter the following command at the router pim level:
FastIron SuperX Router(config)# router pim
FastIron SuperX Router(config-pim-router)# hardware-drop
Syntax: hardware-drop
When you enable the hardware-drop feature, the show ip pim mcache command includes “drop” in the flag field
if a CAM is installed for the purpose of the drop. For example,
Configuring Multicast Source Discovery Protocol (MSDP)
The Multicast Source Discovery Protocol (MSDP) is used by Protocol Independent Multicast (PIM) Sparse routers
to exchange routing information for PIM Sparse multicast groups across PIM Sparse domains. Routers running
MSDP can discover PIM Sparse sources that are in other PIM Sparse domains.
PIM Sparse routers use MSDP to register PIM Sparse multicast sources in a domain with the Rendezvous Point
(RP) for that domain.
Figure 19.4 shows an example of some PIM Sparse domains. For simplicity, this example show only one
Designated Router (DR), one group source, and one receiver for the group. Only one PIM Sparse router within
each domain needs to run MSDP.
FastIron SuperX Router# show ip pim mcache
1 (110.110.110.10 224.1.11.1) in v110 (e4/6), cnt=72
Source is directly connected
Sparse Mode, RPT=0 SPT=1 Reg=0
fast=1 slow=0 pru=0 swL2=0 hwL2=0 drop
age=60s up-time=183m fid=08ac, cam=3818,
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