Netgear XCM8806 Chassis User Manual - Page 722

NETGEAR 8800 User Manual Other Configuration Change This cease notification subcode is sent when the following configuration entities change: • BGP neighbor is added to a peer group • BGP neighbor is configured as a route-reflector client • BGP neighbor is part of a peer group and the following configuration elements of the peer group are changed: • Password • Remote-as • Hold-time, keepalive-time • Source interface • Soft-in-reset Connection Collision Resolution This cease notification subcode is sent when there is a BGP connection collision. Fast External Fallover BGP fast external fallover uses the BGP protocol to converge quickly in the event of a link failure that connects it to an EBGP neighbor. The fast external fallover module consists of two commands; one for enabling fallover (enable bgp fast-external-fallover) and one for disabling fallover (disable bgp fast-external-fallover). Fast external fallover is disabled by default. These commands apply to all directly-connected external BGP neighbors. When BGP fast external fallover is enabled, the directly-connected EBGP neighbor session is immediately reset when the connecting link goes down. If BGP fast external fallover is disabled, BGP waits until the default hold timer expires (3 keepalives) to reset the neighboring session. In addition, BGP may tear down the session somewhat earlier than hold timer expiry if BGP detects that the TCP session and it's directly connected link is broken (BGP detects this while sending or receiving data from TCP socket). Capability Negotiation BGP supports the following capabilities by default: • IPv4 Unicast address family • IPv4 Multicast address family • Route-Refresh (new, code = 64) • 4-Byte-AS (code = 65) • Route Refresh Cisco style (code = 128) 722 | Chapter 26. BGP