Configuring Inter-As Option B - HP 12500 Series Configuration Manual
Mpls, routing switch series
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Also See for 12500 Series:
- Configuration manual (338 pages) ,
- Network management and monitoring command reference (320 pages) ,
- Command reference manual (157 pages)
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NOTE:
In the inter-AS option A solution, for the same VPN, the VPN targets configured on the PEs must match
those configured on the ASBR-PEs in the same AS to make sure that VPN routes sent by the PEs (or
ASBR-PEs) can be received by the ASBR-PEs (or PEs). VPN targets configured on the PEs in different ASs
do not have such requirements.
Configuring inter-AS option B
To configure inter-AS option B on ASBR PEs:
To do...
Enter system view
Enter interface view for the
interface connecting to the remote
ASBR-PE
Configure the IP address of the
interface
Return to system view
Enter BGP view
Enter BGP-VPNv4 subaddress
family view
Disable VPN target filtering for
VPNv4 routes
In the inter-AS option B solution, the ASBR PEs must maintain all VPNv4 routing information and advertise
the information to peer ASBR PEs. In this case, the ASBR PEs must receive all VPNv4 routing information
without performing VPN target based filtering.
NOTE:
In the inter-AS option B solution, for the same VPN, the VPN targets for the VPN instances on the PEs in
different ASs must match.
CAUTION:
For inter-AS option B, the following configuration methods are available:
Do not change the next hop on an ASBR. With this method, you still need to configure MPLS LDP
•
between ASBRs.
•
Change the next hop on an ASBR. With this method, MPLS LDP is not required between ASBRs.
The switch supports only the second method. Therefore, MP-eBGP routes will get their next hops changed
by default before being redistributed to MP-iBGP. However, normal eBGP routes to be advertised to iBGP
do not have their next hops changed by default. To change the next hops to local addresses, use the peer
ip-address
{
3—IP Routing Configuration Guide
group-name
|
} next-hop-local command. For information about the command, see
.
Use the command...
system-view
interface interface-type
interface-number
ip address ip-address { mask |
mask-length }
quit
bgp as-number
ipv4-family vpnv4
undo policy vpn-target
228
Remarks
—
—
Required
—
—
—
Required
By default, PE performs VPN target
filtering of the received VPNv4
routes.
The routes surviving the filtering
will be added to the routing table,
and the others are discarded.
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Troubleshooting
