Solved

static route vlan intf  - when is route NOT in forwarding table??

Posted on 2007-11-13
5
623 Views
Last Modified: 2008-01-16
I have a vlan interface and two gig-e switchports on it.  Only if both switchports become down am I to assume that the vlan will be down thus the static route will disappear from forwarding table.  What if one port is admin down, but the other is up -  theb I assume that the vlan is still up and the static route persists in the forwarding table.

OK - What if my ONE AND ONLY gig-e port on that vlan is up and suddenly gets it's Ethernet cable pulled and removed from the interface - how quick will this route disappear from forwarding table? in seconds? milliseconds? microseconds?  Anyone know how quick this stuff happens?
0
Comment
Question by:umbasa
  • 2
5 Comments
 
LVL 50

Accepted Solution

by:
Don Johnston earned 250 total points
ID: 20275847
As soon as the link status for the physical port is lost, the VLAN interface will immediately show the line protocol is down. At that point the static route will be removed from the routing table. Exactly how fast, I don't know. I've never timed it, but it's pretty quick.
0
 
LVL 1

Assisted Solution

by:Deathbob
Deathbob earned 250 total points
ID: 20299971
In my experience removing entries from the routing table happens in less than 1 second from the time that the interface goes down. Beyond that, it's hard to time it.
0
 
LVL 1

Expert Comment

by:Deathbob
ID: 20299987
Note: My comment was from a linux based router.
I could guess that a cisco device would be as fast/faster.
0
 

Author Comment

by:umbasa
ID: 20674310
thanks Deathbob! excellent.
0

Featured Post

MIM Survival Guide for Service Desk Managers

Major incidents can send mastered service desk processes into disorder. Systems and tools produce the data needed to resolve these incidents, but your challenge is getting that information to the right people fast. Check out the Survival Guide and begin bringing order to chaos.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

David Varnum recently wrote up his impressions of PRTG, based on a presentation by my colleague Christian at Tech Field Day at VMworld in Barcelona. Thanks David, for your detailed and honest evaluation!
I had an issue with InstallShield not being able to use Computer Browser service on Windows Server 2012. Here is the solution I found.
Viewers will learn how to connect to a wireless network using the network security key. They will also learn how to access the IP address and DNS server for connections that must be done manually. After setting up a router, find the network security…
Internet Business Fax to Email Made Easy - With  eFax Corporate (http://www.enterprise.efax.com), you'll receive a dedicated online fax number, which is used the same way as a typical analog fax number. You'll receive secure faxes in your email, f…

825 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question