Dell FCX624-I Laptop User Manual


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762 PowerConnect B-Series FCX Configuration Guide
53-1002266-01
PIM Passive
25
Syntax: show ip pim error
This command displays the number of warnings and non-zero PIM errors on the device. This count
can increase during transition periods such as reboots and topology changes; however, if the
device is stable, the number of errors should not increase. If warnings keep increasing in a stable
topology, then there may be a configuration error or problems on the device.
To clear the counter for PIM errors, enter the following command.
PowerConnect#clear pim counters
Syntax: clear pim counters
PIM Passive
PIM Passive is used to reduce and minimize unnecessary PIM Hello and other PIM control
messages.
PIM Passive allows you to specify that the interface is “passive” in regards to PIM. No PIM control
packets are sent or processed (if received), but hosts can still send and receive multicast traffic
and IGMP control traffic on that interface. Also, PIM Passive prevents any malicious router from
taking over as the designated router (DR), which can prevent all hosts on the LAN from joining
multicast traffic outside the LAN.
The following guidelines apply to PIM Passive:
1. This is a Layer 3 interface [Ethernet/Ve] level feature.
2. Since the loopback interfaces are never used to form PIM neighbors, this feature is not
supported on loopback interface.
3. Both PIM SM and PIM DM modes support this feature.
4. Applying the PIM Passive on an interface requires PIM to be enabled on that interface.
5. The sent and received statistics of a PIM Hello message are not changed for an interface,
while it is configured as PIM passive.
To enable PIM Passive on an interface, enter the following command:
Syntax: [no] ip pim passive
Use the show ip pim interface command to display multicast boundary information related to PIM
passive.
PowerConnect# config term
PowerConnect(config)#router pim
PowerConnect(config-pim-router)#exit
PowerConnect(config)#interface ethernet 2
PowerConnect(config-if-e1000-2)#ip pim
PowerConnect(config-if-e1000-2)#ip pim passive
PowerConnect(config-if-e1000-2)#exit
PowerConnect(config)#interface ve 2
PowerConnect(config-vif-2)#ip pim-sparse
PowerConnect(config-vif-2)#ip pim passive
PowerConnect(config-vif-2)#exit