H3C S7500E Series Ethernet Switches Operation Manual

Operation Manual – IPv6 Routing
H3C S7500E Series Ethernet Switches Chapter 5 IPv6 BGP Configuration
5-13
To do... Use the command... Remarks
Enter system view
system-view
—
Enter BGP view
bgp as-number
Required
Enter IPv6 address family
view
ipv6-family —
Configure a default MED
value
default med med-value
Optional
Defaults to 0
Enable to compare MED
values of routes from
different EBGP peers
compare-different-as-m
ed
Optional
Not enabled by default
Prioritize MED values of
routes from each AS
bestroute compare-med
Optional
Not configured by default
Prioritize MED values of
routes from confederation
peers
bestroute
med-confederation
Optional
Not configured by default
5.5.4 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
Required
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
peer { ipv6-group-name |
ipv6-address }
allow-as-loop [ number ]
Optional
Not allowed by default
Specify a fake AS number
for a peer/peer group
peer { ipv6-group-name |
ipv6-address } fake-as
as-number
Optional
Not specified by default
Neglect the AS_PATH
attribute for best route
selection
bestroute
as-path-neglect
Optional
Not neglected by default
Configure to carry only the
public AS number in
updates sent to a
peer/peer group
peer { ipv6-group-name |
ipv6-address }
public-as-only
Optional
By default, BGP updates
carry private AS number