3Com Switch 4800G 24-Port Configuration Manual page 475

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Configuring the MED
Attribute
Configuring the
AS_PATH Attribute
To do...
Configure the default value
for local preference
Advertise routes to a
peer/peer group with the local
router as the next hop
To make sure an IBGP peer can find the correct next hop, you can configure
■
routes advertised to the peer to use the local router as the next hop. If BGP
load balancing is configured, the local router specifies itself as the next hop of
outbound routes to a peer/peer group regardless of whether the peer
next-hop-local command is configured.
In a "third party next hop" network, that is, the two EBGP peers reside in a
■
common broadcast subnet, the router does not specify itself as the next hop
for routes to the EBGP peer by default, unless the peer next-hop-local
command is configured.
Follow these steps to configure the MED attribute:
To do...
Enter system view
Enter BGP view
Enter IPv6 address family
view
Configure a default MED
value
Enable to compare MED
values of routes from
different EBGP peers
Prioritize MED values of
routes from each AS
Prioritize MED values of
routes from confederation
peers
Follow these steps to configure the AS_PATH attribute:
To do...
Enter system view
Enter BGP view
Enter IPv6 address family view ipv6-family
Allow the local AS number to
appear in AS_PATH of routes
from a peer/peer group and
specify the repeat times
Configuring IPv6 BGP Route Attributes
Use the command...
default local-preference
value
peer { ipv6-group-name |
ipv6-address }
next-hop-local
Use the command...
system-view
bgp as-number
ipv6-family
default med med-value
compare-different-as-med
bestroute compare-med
bestroute
med-confederation
Use the command...
system-view
bgp as-number
peer { ipv6-group-name |
ipv6-address } allow-as-loop
[ number ]
475
Remarks
Optional
The value defaults to 100
Required
By default, the feature is
available for routes advertised
to the EBGP peer/peer group,
but not available to the IBGP
peer/peer group
Remarks
-
Required
-
Optional
Defaults to 0
Optional
Not enabled by default
Optional
Not configured by default
Optional
Not configured by default
Remarks
-
Required
-
Optional
Not allowed by default