Dell C1048P Port Extender Networking Configuration Guide for the C9000 Series - Page 690

Preventing MSDP from Caching a Remote Source To prevent MSDP from caching a remote source, use the following commands. 1 OPTIONAL: Cache sources that the SA filter denies in the rejected SA cache. CONFIGURATION mode ip msdp cache-rejected-sa 2 Prevent the system from caching remote sources learned from a specific peer based on source and group. CONFIGURATION mode ip msdp sa-filter list out peer list ext-acl 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 239.0.0.1 10.11.4.2 192.168.0.1 192.168.0.1 1 R3(conf)#do show ip msdp sa-cache R3(conf)# R3(conf)#do show ip msdp peer UpTime 00:03:59 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 Multicast Source Discovery Protocol (MSDP) 690