3Com Switch 8800 Configuration Guide
Chapter 37 BGP/MPLS VPN Configuration
37-20
Table 37-19
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
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.
Table 37-20
Configure peer group
Operation
Command
Configure a peer group
group
group
-
name
[
internal
|
external
]
Delete the specified peer group
undo group
group
-
name
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.
Table 37-21
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
]
Step 3: Activate peer (group)
