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a.
Execute the
display bgp peer l2vpn evpn
command on the devices to view their BGP
settings.
b.
Verify that the EBGP or IBGP peers on the devices have matching AS numbers. If the AS
numbers do not match, use the
peer as-number
command to modify the AS numbers.
c.
Verify that the devices use different router IDs. If the devices use the same router ID, use
the
router-id
command to modify the router ID of one device.
2.
Verify that the devices have connectivity:
a.
Verify that one device can ping the other device.
b.
If the ping fails, check for link failure and verify that the devices have routes to each other.
3.
Verify that the memory usage of each device is below the critical alarm threshold:
a.
Execute the
display memory-threshold
command on each device to view its memory
usage.
b.
Verify that the memory usage is below the critical alarm threshold in the last 10 minutes.
c.
If the memory usage stays above the critical alarm threshold, contact Hewlett Packard
Enterprise Support.
4.
Perform the following tasks to collect information and contact Hewlett Packard Enterprise
Support:
a.
Execute the
debugging bgp event
command to view possible causes for neighbor
relationship setup failure, such as connection setup errors and connection conflicts.
b.
Execute the
debugging bgp open
command to view errors in OPEN message
transmission and receipt.
c.
Execute the
debugging tcp packet
command to view TCP packet exchange failure.
d.
Execute the
display bgp peer l2vpn evpn verbose
command to view neighbor address
family negotiation information and packet transmission and receipt history.
e.
Execute the
display bgp peer l2vpn evpn log-info
command to view neighbor status
changes and neighbor down reasons.
f.
Execute the
display system internal bgp peer l2vpn evpn session statistics
command
to view session status details.
ECMP forwarding failure
Symptom
In an EVPN network, the device cannot forward packets through ECMP routes.
