Preventing Msdp From Advertising A Local Source - Dell S4820T Configuration Manual

!
ip access-list extended myremotefilter
seq 5 deny ip host 239.0.0.1 host 10.11.4.2
R3_E600(conf)#do show ip msdp sa-cache
MSDP Source-Active Cache - 1 entries
GroupAddr SourceAddr
239.0.0.1 10.11.4.2
R3_E600(conf)#do show ip msdp sa-cache
R3_E600(conf)#
R3_E600(conf)#do show ip msdp peer
Peer Addr: 192.168.0.1
Local Addr: 0.0.0.0(639) Connect Source: Lo 0
State: Listening Up/Down Time: 00:01:19
Timers: KeepAlive 30 sec, Hold time 75 sec
SourceActive packet count (in/out): 0/0
SAs learned from this peer: 0
SA Filtering:
Input (S,G) filter: myremotefilter
Output (S,G) filter: none

Preventing MSDP from Advertising a Local Source

To prevent MSDP from advertising a local source, use the following command.
• Prevent an RP from advertising a source in the SA cache.
CONFIGURATION mode
ip msdp sa-filter list in peer list ext-acl
Example of Verifying the System is not Advertising Local Sources
In the following example, R1 stops advertising source 10.11.4.2. Because it is already in the SA cache of
R3, the entry remains there until it expires.
[Router 1]
R1_E600(conf)#do show run msdp
!
ip multicast-msdp
ip msdp peer 192.168.0.3 connect-source Loopback 0
ip msdp sa-filter out 192.168.0.3 list mylocalfilter
R1_E600(conf)#do show run acl
!
ip access-list extended mylocalfilter
seq 5 deny ip host 239.0.0.1 host 10.11.4.2
seq 10 deny ip any any
R1_E600(conf)#do show ip msdp sa-cache
MSDP Source-Active Cache - 1 entries
GroupAddr SourceAddr
239.0.0.1 10.11.4.2
R3_E600(conf)#do show ip msdp sa-cache
MSDP Source-Active Cache - 1 entries
GroupAddr SourceAddr
239.0.0.1 10.11.4.2
[Router 3]
R3_E600(conf)#do show ip msdp sa-cache
R3_E600(conf)#
634
RPAddr LearnedFrom
192.168.0.1 192.168.0.1
RPAddr LearnedFrom
192.168.0.1 local
RPAddr LearnedFrom
192.168.0.1 192.168.0.1
Expire UpTime
1 00:03:59
Expire UpTime
70 00:27:20
Expire UpTime
1 00:10:29
Multicast Source Discovery Protocol (MSDP)