Configuring the med attribute, Configuring the as_path attribute – H3C Technologies H3C S10500 Series Switches User Manual
Page 347
332
NOTE:
•
To ensure an iBGP peer can find the correct next hop, configure routes advertised to the IPv6 iBGP peer
or peer group 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 routes sent to an IPv6 iBGP peer or peer group regardless of
whether the peer next-hop-local command is configured.
•
In a
third party next hop network where the two IPv6 eBGP peers reside in a common broadcast subnet,
the router does not change the next hop for routes sent to the IPv6 eBGP peer or peer group by default,
unless the peer next-hop-local command is configured.
Configuring the MED attribute
Follow these steps to configure the MED attribute:
To do…
Use the command…
Remarks
Enter system view
system-view
—
Enter BGP view
bgp as-number
—
Enter IPv6 address family view
ipv6-family
—
Configure a default MED value
default med med-value
Optional
Defaults to 0
Enable the comparison of MED for
routes from different eBGP peers
compare-different-as-med
Optional
Not enabled by default.
Enable the comparison of MED for
routes from each AS
bestroute compare-med
Optional
Disabled by default
Enable the comparison of MED for
routes from confederation peers
bestroute med-confederation
Optional
Disabled by default
Configuring the AS_PATH attribute
Follow these steps to configure the AS_PATH attribute:
To do…
Use the command…
Remarks
Enter system view
system-view
—
Enter BGP view
bgp as-number
—
Enter IPv6 address family view
ipv6-family
—
Allow the local AS number to
appear in AS_PATH of routes from
a peer or peer group and specify
the repeat times
peer { ipv6-group-name |
ipv6-address } allow-as-loop
[ number ]
Optional
Not allowed by default
Specify a fake AS number for an
IPv6 peer or peer group
peer { ipv6-group-name |
ipv6-address } fake-as as-number
Optional
Not specified by default.
Disable IPv6 BGP from considering
the AS_PATH during best route
selection
bestroute as-path-neglect
Optional
Enabled by default.