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BGP (BGP peerings (iBGP peering (To modify next-hop attribute: (neighbor…

- - - - clear ip bgp *
    - - clear ip bgp * out
    - - clear ip bgp * in
    - - clear ip bgp 155.1.45.5 in
  - - - neighbor next-hop-self
      - route-map action set ip next-hop
      - next-hop-self ALL
  - - - Inbound updates containing local ASN are discarded
      - allowas-in
      - as-override
    - - Otubound eBGP updates have local update-source for neighbor set as next-hop
      - Modified
        
        route-map action set ip next-hop
        
        neighbor next-hop-unchanged
        
        Thrid party next-hop
- - - - Don't advertise to eBPG peers
    - - Don't advertise to any peers
    - - Don't advertise to confederation eBGP peers
  - - - standard
        
        Matches community name or number
        
        ip community-list 1 standard permit no-export
      - Expanded
        
        Matches regular expression
        
        ip community-list expanded AS100 PERMIT 100:[0-9]+
- - - - prefix matched in non-exist-map does not exist
        
        neighbor x.x.x.x advertise-map map1 non-exist-map map2
      - prefix matched in exist-map does exist
        
        neighbor x.x.x.x advertise-map map1 exist-map map2
  - - - Inect map
        
        Subnet to be advertised
        
        set ip address prefix-list [list]
      - Exist map
        
        Aggregate to be originated from
        
        match ip address prefix-list [list]
        
        Match ip route-source prefix-list [list]
- - - - Supress more specific routes
    - - supress subset of more specific routes (negative logic)
    - - Maintains an unorder-list of the ASes
    - - Does not include the AS in the advertise map
    - - To modify a given attribute
    - - under the neighbor statement
        
        To leak a prefix to a neighbor