Dell EMC Configuration Guide for the S3100 Series 9.14.2.4

Example of Verifying the System is not Caching Remote Sources

As shown in the following example, R1 is advertising source 10.11.4.2. It is already in the SA cache of R3 when an ingress SA filter is applied to R3. The entry remains in the SA cache until it expires and is not stored in the rejected SA cache.

[Router 3]
R3(conf)#do show run msdp
!
ip multicast-msdp
ip msdp peer 192.168.0.1 connect-source Loopback 0
ip msdp sa-filter in 192.168.0.1 list myremotefilter
R3(conf)#do show run acl
!
ip access-list extended myremotefilter
  seq 5 deny ip host 239.0.0.1 host 10.11.4.2
R3(conf)#do show ip msdp sa-cache
MSDP Source-Active Cache - 1 entries
GroupAddr  SourceAddr  RPAddr       LearnedFrom  Expire  UpTime
239.0.0.1  10.11.4.2   192.168.0.1  192.168.0.1  1       00:03:59
R3(conf)#do show ip msdp sa-cache
R3(conf)#
R3(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