Command History Version Description9.9(0.0) Introduced on the C9010.9.2(1.0) Introduced on the Z9500.8.2.1.0 Introduced on the E-Series ExaScale.7.4.1.0 IntroducedUsage Information Timer values configured with the neighbor timers command override the timervalues configured with the timers bgp command.When two neighbors, configured with different keepalive and holdtime values,negotiate for new values, the resulting values are as follows:• the lower of the holdtime values is the new holdtime value, and• whichever is the lower value; one-third of the new holdtime value, or theconfigured keepalive value is the new keepalive value.neighbor update-sourceEnable the software to use Loopback interfaces for TCP connections for BGP sessions.C9000 SeriesSyntax neighbor {ipv6-address | peer-group-name} update-source loopbackinterfaceTo use the closest interface, use the no neighbor {ipv6-address | peer-group-name} update-source loopback interface command.Parameters ipv6-address Enter the IPv6 address in the x:x:x:x::x format.NOTE: The :: notation specifies successive hexadecimalfields of zeros.peer-group-name Enter the name of the peer group to disable all routers withinthe peer group.loopbackinterfaceEnter the keyword loopback followed by a number of theloopback interface. The range is 0 to 16383.Defaults Not configured.Command Modes ROUTER BGPBorder Gateway Protocol 617
