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a.
Execute the
display bgp l2vpn evpn route-distinguisher
route-distinguisher evpn-route
route-length
command.
b.
Verify that the routes have the same BGP community attributes and extended community
attributes.
c.
If the routes have different BGP community attributes and extended community attributes,
modify the attributes.
3.
Verify that the routes do not have the default-gateway attribute:
a.
Execute the
display bgp l2vpn evpn route-distinguisher
route-distinguisher evpn-route
route-length
command.
b.
Verify that the routes do not have the default-gateway attribute. Routes with this attribute
cannot act as ECMP routes.
c.
If the routes have the default-gateway attribute, delete the attribute.
4.
Verify that the routes are all BGP routes:
a.
Execute the
display ip routing-table vpn-instance
command.
b.
Verify that the routes are all BGP routes.
c.
If some of the routes are from other protocols, raise the priority of BGP routes by using the
preference
command.
5.
Verify that the number of BGP ECMP routes is larger than one:
a.
Execute the
display bgp routing-table ipv4 vpn-instance
command to verify that multiple
routes have the same prefix.
b.
If one of the routes that have the same prefix has the optimal sign (
>
), execute the
display
current-configuration configuration bgp
command to verify that the
balance
command
has been executed in BGP-VPN IPv4 unicast address family view.
c.
If the
balance
command is not executed, use it to set the number of BGP ECMP routes to a
value larger than 1.
6.
If the problem persists, contact H3C Support.
VXLAN tunnel establishment failure
Symptom
In an EVPN network, two devices can establish a BGP neighbor relationship but cannot
automatically set up a VXLAN tunnel between them.
