546 CHAPTER 49: BGP/MPLS VPN CONFIGURATION
By default, the cost value is 1, dead value is 40 seconds, hello value is 10 seconds,
retransmit value is 5 seconds and trans-delay value is 1 second.
4 Configure EBGP on PE
If you select EBGP between PE and CE, you should configure a neighbor for each
VPN in VPN instance address family sub-view, and import IGP route of CE.
Step 1: Configure peer group
Configuring peer group in VPN instance address family view.
By default, the peer group is configured as internal. When BGP mode is used for
PE-CE route switching, they often belong to different ASs, so you should configure
EBGP peer as external.
Step 2: Configure AS number for a specific neighbor and add group member to a
peer group
When EBGP mode is used for PE-CE route switching, you should configure AS
number for a specific neighbor for every CE VPN-instance.
Perform the following configuration in VPN instance address family view.
Step 3: Activate peer (group)
By default, BGP neighbor is active while MBGP neighbor is inactive. You should
activate MBGP neighbor in VPNv4 sub-address family view.
Perform the following configuration in VPNv4 sub-address family view.
Tabl e 539 Configure Sham-link
Operation Command
Configure Sham-link
sham-link source-addr destination-addr [ cost cost-value ] [ simple
password | md5 keyid key ] [ dead seconds ] [ hello seconds ] [
retransimit seconds ] [ trans-delay seconds ]
Delete a Sham-link undo sham-link source-addr destination-addr
Tabl e 540 Configure peer group
Operation Command
Configure a peer group group group-name [ internal | external ]
Delete the specified peer group undo group group-name
Tabl e 541 Configure AS number for a specific neighbor
Operation Command
Configure AS number for a
specific neighbor
peer { group-name | [ peer-address group group-name ] }
as-number as-number
Delete the AS number of a
specific neighbor
undo peer { group-name | [peer-address group group-name ] }
as-number as-number]
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