Concept Guide

address-family ipv6 unicast
neighbor 10.1.1.1 activate
exit-address-family
!
Following is the show ip bgp ipv6 unicast command output for the above conguration.
DellEMC# show ip bgp ipv6 unicast
BGP local RIB : Routes to be Added 0, Replaced 0, Withdrawn 0
BGP local router ID is 1.1.1.1
Status codes: s suppressed, S stale, d dampened, h history, * valid, > best
Path source: I - internal, a - aggregate, c - confed-external, r - redistributed
n - network, D - denied, S - stale
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
*> 2001::/64 2001::1 0 0 655 ?
*> 3001::/64 3001::1 0 0 655 ?
*> 4001::/64 3001::1 0 0 655 ?
*> 5001::/64 3001::1 0 0 655 ?
BGP Regular Expression Optimization
Dell EMC Networking OS optimizes processing time when using regular expressions by caching and re-using regular expression evaluated
results, at the expense of some memory in RP1 processor.
BGP policies that contain regular expressions to match against as-paths and communities might take a lot of CPU processing time, thus
aect BGP routing convergence. Also, show bgp commands that get ltered through regular expressions can to take a lot of CPU cycles,
especially when the database is large.
This feature is turned on by default. If necessary, use the bgp regex-eval-optz-disable command in CONFIGURATION ROUTER
BGP mode to disable it.
Debugging BGP
To enable BGP debugging, use any of the following commands.
• View all information about BGP, including BGP events, keepalives, notications, and updates.
EXEC Privilege mode
debug ip bgp [ip-address | peer-group peer-group-name] [in | out]
• View information about BGP route being dampened.
EXEC Privilege mode
debug ip bgp dampening [in | out]
• View information about local BGP state changes and other BGP events.
EXEC Privilege mode
debug ip bgp [ip-address | peer-group peer-group-name] events [in | out]
• View information about BGP KEEPALIVE messages.
EXEC Privilege mode
debug ip bgp [ip-address | peer-group peer-group-name] keepalive [in | out]
• View information about BGP notications received from or sent to neighbors.
EXEC Privilege mode
debug ip bgp [ip-address | peer-group peer-group-name] notifications [in | out]
• View information about BGP updates and lter by prex name.
EXEC Privilege mode
Border Gateway Protocol (BGP)
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