334
Step Command
Remarks
15.
Set the maximum number of
routes BGP can receive from
a peer or peer group.
peer
{
group-name
|
ipv4-address
[
mask-length
] }
route-limit
prefix-number
[ {
alert-only
|
discard
|
reconnect
reconnect-time
} |
percentage-value
] *
By default, the number of routes
that BGP can receive from a peer
or peer group is not limited.
16.
Enable route reflection
between clients.
reflect between-clients
By default, route reflection
between clients is enabled.
17.
Configure a cluster ID for the
RR.
reflector cluster-id
{
cluster-id
|
ip-address
}
By default, an RR uses its own
router ID as the cluster ID.
If more than one RR exists in a
cluster, use this command to
configure the same cluster ID for
all RRs in the cluster to avoid
routing loops.
18.
Configure filtering of
reflected routes.
rr-filter
ext-comm-list-number
By default, an RR does not filter
reflected routes.
Only IBGP routes whose
extended community attribute
matches the specified community
list are reflected.
By configuring different filtering
policies on RRs, you can
implement load balancing among
the RRs.
19.
Configure the SoO attribute
for a BGP peer for peer
group.
peer
{
group-name
|
ipv4-address
[
mask-length
] }
soo
site-of-origin
By default, the SoO attribute is not
configured.
Configuring inter-AS IPv6 VPN
If the MPLS backbone spans multiple ASs, you must configure inter-AS IPv6 VPN.
There are three inter-AS VPN solutions (for more information, see "
L3VPN supports only inter-AS VPN option A and option C.
Before configuring inter-AS IPv6 VPN, perform the following tasks:
•
Configure an IGP for the MPLS backbone in each AS to ensure IP connectivity.
•
Configure basic MPLS for the MPLS backbone of each AS.
•
Configure MPLS LDP for the MPLS backbones so that LDP LSPs can be established.
The following sections describe inter-AS IPv6 VPN option A and option C. Select one according to
your network scenario.
Configuring inter-AS IPv6 VPN option A
Inter-AS IPv6 VPN option A applies to scenarios where the number of VPNs and that of VPN routes
on the PEs are relatively small.
To configure inter-AS IPv6 option A, perform the following tasks:
•
Configure basic IPv6 MPLS L3VPN on each AS.
•
Configure VPN instances on both PEs and ASBRs. The VPN instances on PEs allow CEs to
access the network, and those on ASBRs are for access of the peer ASBRs.
