Administrator Guide

Interface state: Interface, next-Hop, State/Mode
(*, 192.1.2.1), uptime 00:29:36, expires 00:03:26, RP 10.87.2.6, flags: SCJ
Incoming interface: GigabitEthernet 4/12, RPF neighbor 10.87.3.5
Outgoing interface list:
GigabitEthernet 4/11
GigabitEthernet 7/13
(10.87.31.5, 192.1.2.1), uptime 00:01:24, expires 00:02:26, flags: FT
Incoming interface: GigabitEthernet 7/11, RPF neighbor 0.0.0.0
Outgoing interface list:
GigabitEthernet 4/11
GigabitEthernet 4/12
GigabitEthernet 7/13
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Conguring S,G Expiry Timers
By default, S, G entries expire in 210 seconds. You can congure a global expiry time (for all [S,G] entries) or congure an expiry time
for a particular entry.
If you congure both, the ACL supersedes the global conguration for the specied entries.
When you create, delete, or update an expiry time, the changes are applied when the keep alive timer refreshes.
To congure a global expiry time or to congure the expiry time for a particular (S,G) entry, use the following commands.
1. Enable global expiry timer for S, G entries.
CONFIGURATION mode
ip pim sparse-mode sg-expiry-timer seconds
The range is from 211 to 86,400 seconds.
The default is 210.
2. Create an extended ACL.
CONFIGURATION mode
ip access-list extended access-list-name
3. Specify the source and group to which the timer is applied using extended ACLs with permit rules only.
CONFIG-EXT-NACL mode
[seq sequence-number] permit ip source-address/mask | any | host source-address}
{destination-address/mask | any | host destination-address}
4. Set the expiry time for a specic (S,G) entry (as shown in the following example).
CONFIGURATION mode
ip pim sparse-mode sg-expiry-timer seconds sg-list access-list-name
The range is from 211 to 86,400 seconds.
The default is 210.
Example Conguring an (S,G) Expiry Time
NOTE: The expiry time conguration is nullied and the default global expiry time is used if:
• an ACL is specied in the ip pim sparse-mode sg-expiry-timer command, but the ACL has not been created
or is a standard ACL.
• if the expiry time is specied for an (S,G) entry in a deny rule.
PIM Sparse-Mode (PIM-SM)
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