1-41
To do…
Use the command…
Remarks
Enter BGP-VPNv4 subaddress
family view
ipv4-family vpnv4
Required
Enable the exchange of
BGP-VPNv4 routing
information with a peer
peer
{
group-name
|
ip-address
}
enable
Required
Specify a BGP peer or peer
group as the UPE
peer
{
group-name
|
ip-address
}
upe
Required
Specify to advertise default
routes of a VPN instance to a
UPE
peer
{
group-name
|
ip-address
}
default-route-advertise
vpn-instance
vpn-instance-name
Specify to advertise routes
permitted by a specified routing
policy to a UPE
peer
{
group-name
|
ip-address
}
upe route-policy
route-policy-name export
Required
Configure either command.
By default, BGP does not
advertise default routes to a
VPNv4 peer.
With the
peer default-route-advertise vpn-instance
command configured, the SPE always advertises
a default route using the local address as the next hop address to the UPE, regardless of whether the
default route is present in the local routing table or not.
z
The default routes of a VPN instance can be advertised to only a BGP peer or peer group that is
UPE.
z
It is not recommended to configure the
peer default-route-advertise vpn-instance
command and
the
peer upe route-policy
command at the same time.
z
It is not recommended for an SPE to be connected to a CE directly. If an SPE must be directly
connected with a CE, the VPN instance on the SPE and that on the UPE must be configured with
different RDs.
Configuring OSPF Sham Link
The sham link is considered an OSPF intra-area route. It is used to ensure that the VPN traffic is
transmitted over the backbone instead of the backdoor link between two CEs.
The source and destination addresses of the sham link must be loopback interface addresses with
32-bit masks. Besides, the loopback interfaces must be bound to the VPN instances and be advertised
through BGP.
Configuration Prerequisites
Before configuring OSPF sham link, be sure to complete these tasks:
z
Configuring basic MPLS L3VPN (OSPF is used between PE and CE)
z
Configuring OSPF in the LAN where CEs reside
Summary of Contents for S7902E
Page 82: ...1 4 DeviceA interface tunnel 1 DeviceA Tunnel1 service loopback group 1 ...
Page 200: ...1 11 DeviceB display vlan dynamic No dynamic vlans exist ...
Page 598: ...ii ...
Page 1757: ...4 9 ...
Page 1770: ...6 4 ...
Page 2017: ...2 11 Figure 2 3 SFTP client interface ...
Page 2238: ...1 16 DeviceA cfd linktrace service instance 1 mep 1001 target mep 4002 ...
