04-20-2013 10:30 PM - edited 03-12-2019 04:45 PM
Hi,
Could anyone explain the difference between "ip msdp redistribute" and "p msdp sa-filter out" commands? As per
http://www.cisco.com/en/US/docs/ios/12_2/ip/configuration/guide/1cfmsdp_ps1835_TSD_Products_Configuration_Guide_Chapter.html, description looks same. Also, Is MP-BGP is mandatory for MSDP to work? It would be great if someone posts a link which has basic examples of this feature.
Thanks,
Balajee
04-21-2013 01:02 AM
Hello Balajee,
MPBGP is not mandatory.
MSDP depends heavily on BGP or MBGP for interdomain operation. We recommend that you run MSDP in RPs in your domain that are RPs for sources sending to global groups to be announced to the internet.
Example: ip msdp peer x.x.x.x connect-source Loopback0 remote-as 65001
Here when the RP is in another domain(different AS) which is not your local AS, then however you will get connected to the domain via the the only EGP called as BGP.
Thanks
Thanveer
04-22-2013 01:22 AM
Hello Balajee,
the difference between ip msdp redistribute and ip msdp sa-filter out should be the following:
the second command like a route-map applied outbound to a BGP peer applies to all the possible SA messages that can be sent to the neighbor including both the locally learned sources and those SA messages coming from a different ;MSDP peer.
The first command provides filtering options for locally learned sources only
http://www.cisco.com/en/US/docs/ios-xml/ios/ipmulti/command/imc_i2.html#wp2930691609
note the following that explains this
>>When the ip msdp redistribute command is entered without any keywords or arguments, the router will still forward SA messages from other MSDP peers in the normal fashion; it will just not originate any SA messages for local sources.
So they are slightly different
Hope to help
Giuseppe
04-24-2013 08:47 AM
Thanks Giuseppe for the explanation.
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