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11-38
Cisco Nexus 7000 Series NX-OS Unicast Routing Configuration Guide, Release 4.x
OL-20002-02
Chapter 11 Configuring Advanced BGP
Configuring Advanced BGP
To tune BGP, use the following optional commands in neighbor address-family configuration mode:
low-memory exempt
Example:
switch(config-router-neighbor)# low-memory
exempt
Exempts this BGP neighbor from a possible
shutdown due to a low memory condition.
transport connection-mode passive
Example:
switch(config-router-neighbor)# transport
connection-mode passive
Allows a passive connection setup only. This BGP
speaker does not initiate a TCP connection to a
BGP peer. You must manually reset the BGP
sessions after configuring this command.
remove-private-as
Example:
switch(config-router-neighbor)#
remove-private-as
Removes private AS numbers from outbound route
updates to an eBGP peer. This command triggers an
automatic soft clear or refresh of BGP neighbor
sessions.
Note See the “Guidelines and Limitations for
Advanced BGP” section for more
information on this command.
update-source interface-type number
Example:
switch(config-router-neighbor)#
update-source ethernet 2/1
Configures the BGP speaker to use the source IP
address of the configured interface for BGP
sessions to the peer. This command triggers an
automatic notification and session reset for the
BGP neighbor sessions.
Command Purpose
Command Purpose
suppress-inactive
Example:
switch(config-router-neighbor-af)#
suppress-inactive
Advertises the best (active) routes only to the BGP
peer. This command triggers an automatic soft
clear or refresh of BGP neighbor sessions.
default-originate [route-map map-name]
Example:
switch(config-router-neighbor-af)#
default-originate
Generates a default route to the BGP peer.
filter-list list-name {in | out}
Example:
switch(config-router-neighbor-af)#
filter-list BGPFilter in
Applies an AS_path filter list to this BGP peer for
inbound or outbound route updates. This command
triggers an automatic soft clear or refresh of BGP
neighbor sessions.
prefix-list list-name {in | out}
Example:
switch(config-router-neighbor-af)#
prefix-list PrefixFilter in
Applies a prefix list to this BGP peer for inbound
or outbound route updates. This command triggers
an automatic soft clear or refresh of BGP neighbor
sessions.
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