configure terminal
interface Ethernet
<port>
2. Enter the
ip ospf hello-interval 10
command to configure the hello interval to 10.
3. Enter the
ip ospf dead-interval 40
command to configure the dead interval to 40.
4. Repeat steps
2
and
3
for other OSPF-enabled interfaces in your system.
Configuring neighbor router interface hello and dead intervals
Ensure OSPF-enabled neighbor router interface hello and dead intervals are configured to match
the values configured on VSP 7000 OSPF-enabled interfaces.
Procedure
1. Reference vendor documentation for information about configuring hello and dead interval
values for OSPF-enabled interfaces.
2. Configure interface hello intervals to a value of 10 and dead intervals to a value of 40.
MTU size
Maximum Transmission Unit (MTU) size mismatches between OSPF-enabled interfaces on
neighboring routers can cause OSPF neighbors to remain in an
Exstart
or
Exchange
state.
To avoid MTU size mismatches, configure OSPF-enabled interfaces on neighboring routers to
ignore MTU size.
Checking the MTU ignore setting for OSPF interfaces
Display and observe the MTU ignore setting for OSPF–enabled neighbor interfaces.
Procedure
1. Log on to ACLI to enter User EXEC mode.
2. Enter the
show ip ospf interface
command.
3. Observe the
MTU Ignore:
setting in the command output for all OSPF-enabled interfaces.
Configuring OSPF interfaces to ignore MTU size
Configure an OSPF-enabled VLAN interface or switch port to ignore MTU size.
Procedure
1. Enter Interface Configuration mode:
enable
configure terminal
interface Ethernet
<port>
or
interface vlan
<1–4094>
Troubleshooting Layer 3
82
Troubleshooting Avaya VSP 7000 Series
July 2015
