Command Summary

Table 3-3. Command Summary

Command	Description
aggregate-address address mask [as-set] [summary-only] [suppress-map map-name] [advertise-map map-name] [attribute-map map-name]	Creates an aggregate entry in the BGP routing table.
auto-summary	Enables the automatic summarization of subnets to their major network addresses.
bgp always-compare-med	Allows the comparison of MED attributes of routes to the same destination but advertised by peers in different autonomous systems.
bgp bestpath as-path ignore	Tells the BGP process to ignore the AS_PATH length in the BGP decision process.
bgp bestpath med confed	Enables the comparison of MED attributes of routes advertised by confederation EBGP peers.
bgp client-to-client reflection	Enables route reflection between IBGP peers.
bgp cluster-id cluster-id	Sets the cluster ID of a BGP route reflection cluster.
bgp confederation identifier autonomous-system	Specifies the confederation ID (the AS number seen by confederation-exterior peers).
bgp confederation peers autonomous-system [autonomous-system]	Lists the member autonomous systems of a router's confederation EBGP peers.
bgp dampening [half-life reuse suppress max-suppress-time] [route-map map]	Enables route dampening and changes route dampening defaults.
bgp default local-preference value	Changes the default LOCAL_PREF value from 100.
bgp deterministic-med	Enables the comparison of the MED attributes of routes advertised by confederation EBGP peers in the same neighboring member AS.
bgp log-neighbor-changes	Enables logging of neighbor resets.
clear ip bgp {*|address|peer-group-name} [soft [in | out]]	Resets one or more BGP peer connections.
clear ip bgp dampening [address mask]	Clears BGP dampening information and unsuppresses suppressed routes.
clear ip bgp flap-statistics [{regexp regexp}]|{filter-list list}|{address mask}	Clears BGP flap statistics.
clear ip bgp peer-group peer-group-name	Removes all members of a peer group.
default-information originate	Causes a router to advertise the default address 0.0.0.0 to its BGP peers.
default-metric number	Sets the default metric (MED) that a BGP router adds to the routes advertised to EBGP peers.
distance bgp external-distance internal-distance local-distance	Changes the default administrative distances of BGP routes.
ip as-path access-list access-list-number {permit | deny} regexp	Defines an access list that examines the AS_PATH attributes of BGP routes.
ip bgp-community new-format	Displays community attributes in the AA:NN format.
ip community-list community-list-number {permit | deny} community-number	Defines an access list that identifies BGP routes by their COMMUNITY attributes.
ip prefix-list prefix-list-name [seq sequence-number]{permit|deny} {ip\_prefix/length}[ge | le]min/max-length	Defines an access list that examines the NLRI prefix and length advertised in a route.
match as-path path-list-number	Creates a call to an AS_PATH access list.
match community-list community-list-number [exact]	Creates a call to a COMMUNITY access list.
neighbor {ip-address|peer-group-name} advertisement-interval seconds	Changes the default minimum advertisement interval for routing updates to BGP peers.
neighbor {ip-address|peer-group-name} default-originate [route-map map-name]	Causes a router to advertise the default address 0.0.0.0 to the specified neighbor or peer group.
neighbor {ip-address | peer-group-name} description text	Associates a descriptive text string with a neighbor's configuration.
neighbor {ip-address | peer-group-name} distribute-list {access-list-number | prefix-list prefix-list-name} {in | out}	Filters routes to or from a neighbor or peer group by NLRI.
neighbor {ip-address | peer-group-name} ebgp-multihop hops	Changes the default TTL of packets carrying BGP messages to neighbors.
neighbor {ip-address | peer-group-name} filter-list access-list-number {in | out | weight weight}	Filters incoming or outgoing BGP routes by AS_PATH, or sets the weight of incoming routes.
neighbor {ip-address|peer-group-name} maximum-prefix maximum [threshold][warning-only]	Sets a maximum number of NLRI prefixes that can be advertised by a neighbor or peer group.
neighbor {ip-address|peer-group-name} next-hop-self	Causes a BGP router to advertise its own address as the NEXT_HOP attribute of EBGP-learned routes advertised to IBGP peers.
neighbor {ip-address|peer-group-name} password string	Enables MD5 authentication between peers.
neighbor ip-address peer-group peer-group-name	Assigns a neighbor to a peer group.
neighbor peer-group-name peer-group	Creates a peer group.
neighbor {ip-address | peer-group-name} prefix-list prefix-list-name {in|out}	Filters routes to or from a neighbor based on NLRI as identified by a prefix list.
neighbor {ip-address | peer-group-name} remote-as as-number	Adds a neighbor to the BGP neighbor table and identifies the neighbor as EBGP or IBGP.
neighbor {ip-address | peer-group-name} route-map map-name {in|out}	References a route map for setting policy for routes to or from a neighbor or peer group.
neighbor ip-address route-reflector-client	Configures a router as a route reflector and identifies a neighbor as a route reflection client.
neighbor {ip-address|peer-group-name} send-community	Identifies a neighbor to which COMMUNITY attributes are to be sent.
neighbor {ip-address|peer-group-name} shutdown	Disables a neighbor or peer group.
neighbor {ip-address|peer-group-name} soft-reconfiguration inbound	Enables the router to store incoming, unmodified updates from a neighbor for inbound soft reconfiguration.
neighbor {ip-address|peer-group-name} timers keepalive holdtime	Changes the default keepalive and holdtime intervals for a neighbor.
neighbor {ip-address | peer-group-name} update-source interface	Identifies the interface IP address from which IBGP updates are to be sourced.
neighbor {ip-address | peer-group-name} version version	Sets the BGP process to a single version.
neighbor {ip-address | peer-group-name} weight weight	Assigns a weight to routes received from a neighbor.
network network-number [mask network-mask]	Specifies a network to be advertised by the BGP process.
network network-address backdoor	Sets the administrative distance of the specified EBGP route to 200 and disables EBGP advertisement of the route.
network address mask weight weight [route-map map-name]	Assigns a weight to the route to the identified destination.
router bgp autonomous-system	Enables a BGP process on a router and specifies the local AS number.
set as-path {tag | prepend as-path-string}	Sets the AS_PATH of an identified route to the redistributed tag, or prepends the AS_PATH with a specified string of one or more AS numbers.
set comm-list community-list-number delete	Removes the community attributes identified by the called community list from an identified route.
set community {community-number [additive]} | none	Sets a community attribute in an identified route.
set dampening half-life reuse suppress max-suppress-time	Changes the default dampening factors for an identified route.
set metric-type internal	Sets the value of an identified route's MED attribute to match the IGP metric of the next hop.
set origin {igp | egp autonomous-system | incomplete}	Changes the ORIGIN attribute of an identified route.
set weight weight	Sets the weight of an identified route.
show ip bgp [network][network-mask][longer-prefixes]	Displays entries in the BGP table.
show ip bgp cidr-only	Displays entries in the BGP table with non-natural (classless) network masks.
show ip bgp community {community-name | community-number} [exact]	Displays entries in the BGP table with the specified community attribute.
show ip bgp community-list community-list-number [exact]	Displays entries in the BGP table that are permitted by the specified community list.
show ip bgp dampened-paths	Displays dampened (suppressed) paths.
show ip bgp filter-list access-list-number	Displays entries in the BGP table that match the specified access list.
show ip bgp flap-statistics [{regexp regexp} | {filter-list list-number} | {address mask [longer-prefix]}]	Displays the flap statistics of one or more entries in the BGP table.
show ip bgp inconsistent-as	Displays any entries in the BGP table with multiple paths to the same destination but with inconsistent AS_PATH attributes.
show ip bgp neighbors [address][received-routes | routes | advertised-routes | {paths regex} | dampened-routes]	Displays information about the TCP and BGP connections to neighbors.
show ip bgp paths	Displays all BGP paths in the database.
show ip bgp peer-group [peer-group-name][summary]	Displays information about characteristics shared by a peer group.
show ip bgp regexp regexp	Displays entries in the BGP table whose AS_PATH attributes match the specified regular expression.
show ip bgp summary	Displays summary information about all BGP connections.
synchronization	Enables synchronization between BGP and the local IGP.
table-map route-map-name	Enables a call to a route map to modify the metric or tag values of a route being entered into the IGP routing table.
timers bgp keepalive holdtime	Changes the default keepalive and holdtime intervals for the entire BGP process.