ECS4660-28F_Management Guide-R03

C HAPTER 51 | IP Routing Commands
Border Gateway Protocol (BGPv4)
– 1829 –
bgp client-to-client
reflection
Configures route reflection between clients via route
reflector
RC
bgp cluster-id Configures cluster identifier for multiple route
reflectors in the same cluster
RC
bgp confederation
identifier
Configures the identifier for a confederation containing
smaller multiple internal autonomous systems
RC
bgp confederation peer Adds an internal peer autonomous system to a
confederation
RC
bgp dampening Configures route dampening to reduce the
propagation of unstable routes
RC
bgp enforce-first-as Denies an update received from an external peer that
does not list its own autonomous system number at
the beginning of the AS path attribute
RC
bgp fast-external-failover Resets sessions for any directly connected external
peers if the link goes down
RC
bgp log-neighbor-
changes
Enables logging of neighbor resets (that is, up or down
status changes)
RC
bgp network
import-check
Checks the existence of the next-hop and its
accessibility to IGP
RC
bgp router-id Sets the router ID for this device RC
bgp scan-time Sets the interval at which to validate next hop
information for BGP routes
RC
network Specifies a network to advertise RC
redistribute Redistribute routes from one routing domain to
another
RC
timers bgp Sets the Keep Alive time used for maintaining
connectivity, and the Hold time to wait for Keep Alive
messages before declaring a neighbor down
RC
clear ip bgp Clears connections using hard or soft re-configuration PE
clear ip bgp dampening Clears route dampening information and unsuppresses
any suppressed routes
PE
Route Metrics and Selection
bgp always-compare-
med
Allows comparison of the Multi Exit Discriminator
(MED) for paths advertised from neighbors in different
autonomous systems
RC
bgp bestpath as-path
ignore
Ignores AS path length in the selection of a path RC
bgp bestpath compare-
confed-aspath
Compare confederation AS path length in addition to
external AS path length in the selection of a path
RC
bgp bestpath
compare-routerid
Compare similar routes from external peers, and give
preference to a route with the lowest router identifier
RC
bgp bestpath med Enables comparison of MED attribute for paths learned
from confederation peers, and the treatment of a route
when the MED is missing
RC
bgp default
local-preference
Sets the default local preference used for best path
selection among local iBGP peers
RC
bgp deterministic-med Enforces deterministic comparison of the MED
attribute between all paths received from the same
AS, ensuring that selection of the best path will always
be the same, regardless of the order in which the paths
are received by the local router
RC
Table 270: Border Gateway Protocol Commands – Version 4 (Continued)
Command Function Mode