Cisco Nexus 7000 Series - Configuring Virtual Links

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Cisco Nexus 7000 Series NX-OS Unicast Routing Configuration Guide, Release 4.x
OL-20002-02
Chapter 6 Configuring OSPFv2
Configuring Advanced OSPFv2
The following example shows how to create an NSSA that always translates NSSA External (type 5)
LSAs to AS External (type 7) LSAs:
switch# config t
switch(config)# router ospf 201
switch(config-router)# area 0.0.0.10 nssa translate type 7 always
switch(config-router)# copy running-config startup-config
Configuring Virtual Links
A virtual link connects an isolated area to the backbone area through an intermediate area. See the
“Virtual Links” section on page 6-9. You can configure the following optional parameters for a virtual
link:
• Authentication—Sets a simple password or MD5 message digest authentication and associated keys.
• Dead interval—Sets the time that a neighbor waits for a Hello packet before declaring the local
router as dead and tearing down adjacencies.
• Hello interval—Sets the time between successive Hello packets.
• Retransmit interval—Sets the estimated time between successive LSAs.
• Transmit delay—Sets the estimated time to transmit an LSA to a neighbor.
Note You must configure the virtual link on both routers involved before the link becomes active.
You cannot add a virtual link to a stub area.
BEFORE YOU BEGIN
Ensure that you have enabled the OSPF feature (see the “Enabling the OSPFv2 Feature” section on
page 6-14).
Ensure that you are in the correct VDC (or use the switchto vdc command).
SUMMARY STEPS
1. config t
2. router ospf instance-tag
3. area area-id virtual-link router-id
4. show ip ospf virtual-link [brief]
5. copy running-config startup-config