
204
{<ip-address>|<TAG>} dont-capability-negotiate
” command cancels this configuration.
Parameter: <ip-address>
: Neighbor IP address.
<TAG>
: Name of the peer group.
Default:
Capability negotiation performed.
Command Mode:
BGP route mode and address-family mode.
Usage Guide:
As the negotiation is the default, it can be disabled with this configuration when it
is known that the partner BGP version is old which don’t support capability negotiation.
Example:
Last addition capability negotiation will not be realized in the connection by
configuring as follows.
Switch(config-router)#neighbor 10.1.1.64 dont-capability-negotiate
1.8.3.48 neighbor ebgp-multihop
Command: neighbor {<ip-address>|<TAG>} ebgp-multihop [<1-255>]
no neighbor {<ip-address>|<TAG>} ebgp-multihop [<1-255>]
Function:
Configures the EBGP neighbors can existing in different segment as well as its hop
count (TTL). The “
no neighbor {<ip-address>|<TAG>} ebgp-multihop [<1-255>]
” set that the
EBGP neighbors must be in the same segment.
Parameter: <ip-address>
: Neighbor IP address.
<TAG>
: Name of the peer group.
<1-255>
: Allowed hop count.
Default:
Must be in the same segment.
Command Mode:
BGP route mode and address-family mode.
Usage Guide:
Without this command, EBGP peers are required to be in the same segment
and after this command is configured, peer addresses may from different segments. The allowed
hop count can be configured and will be 255 if not.
Example:
Three device 10.1.1.64(AS100) and 11.1.1.120(AS300) connected respectively to the two
interface 10.1.1.66 and 10.1.1.100 of another device. IGP accessibilities of 10.1.1.64 and
11.1.1.120 on both side routes are ensured through static configuration. The neighbor
relationship is established only after both side are configured as follows:
on 10.1.1.64
Switch(config-router)#neighbor 11.1.1.120 ebgp-multihop
on 11.1.1.120
Switch(config-router)#neighbor 10.1.1.64 ebgp-multihop
After this, switches in different segments will be able to create BGP neighbor relationship
1.8.3.49 neighbor enforce-multihop
Command: neighbor {<ip-address>|<TAG>} enforce-multihop