I have a couple of questions regarding this config of a router connected to a provider's MPLS network:
neighbor 22.214.171.124 remote-as 65000
neighbor 126.96.36.199 version 4
neighbor 188.8.131.52 soft-reconfiguration inbound
according to Cisco:
"Whenever there is a change in the routing policy, the BGP session must be cleared, or reset, for the new policy to take effect."
1. What is the meaning of "routing policy"?
Are they talking of route table changes?
2. The "soft-reconfig" allowes any inbound changes in this config, meaning from my MPLS provider to the router the above is configured on, to be dynamically updated without a hard (manual) reset of the process.
Is this correct?
Cisco is saying "soft-reconfig" is the old way and uses much more memory from the router
3. Why the "version 4" ? Do you always have to designate the version?