Panasonic NN46240-710 - Manual (Page 174)

Nortel Secure Router 8000 Series
Troubleshooting - VPN___________ 5 VPLS troubleshooting
If the BGP peer is set up, use the display current-configuration | begin vsi vsi-name
command to check the encapsulation modes of PEs on both ends. If the modes are different,
reconfigure them to be consistent.
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If the fault persists, contact the Nortel technical personnel.
Troubleshooting procedure
Step 1 Use the display vsi command to check that the status of the PW is Up.
Step 2 Use the display vpls connection command to check that the PW exists.
Step 3 Use the display vpls fib command to check that the delivering status of the PW is OK.
Step 4 If the status is OK, check that the operating status of the interface board is normal.
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Summary
In this case, the causes are as follows:
• The PW information is not delivered to the interface board.
• The MAC address entries exceed the MAC limit.
• When the BGP peer is being re-established, the VSI state remains Up for a very short
period.
• The encapsulation modes on PEs of both ends are di^erent.
5.3.3 A VSI cannot be up in BGP signaling mode
Fault symptom
See Figure 5-4.
IBGP runs between PE1 and PE2. A VSI is configured on them. After the configuration, you
find that both the VSI on PE1 and that on PE2 cannot be Up.
Fault analysis
Step 1 Check the status of the VSI on PE1 and that on PE2.
Run the display vsi verbose command.
The display of PE1 is as follows:
VSI Name : bgp1
VSI Index : 0
PW Signaling : bgp
Member Discovery Style : auto
PW MAC Learn Style : unqualify
Encapsulation Type : vlan
MTU : 1500
VSI State : down
Issue 5.3 (30 March 2009) Nortel Networks Inc. 5-15