Cisco Support Community
Community Member

ip ospf transmit-delay and bandwidtht

Hi Guys,

We have a OSPF network connected by high speed metro links. However, the multicast traffic is severely limited by the provider (512k).

So the result is a lot retransmissions, adjacency resets etc.

So I am trying to come up with a way to limit the rate at which OSPF sends its traffic. I know the command does age the LSAs before sending them, but is this all it does, or does it actually affect bandwidht consumption?


Super Bronze

Re: ip ospf transmit-delay and bandwidtht


The  Author of this posting offers the information contained within this  posting without consideration and with the reader's understanding that  there's no implied or expressed suitability or fitness for any purpose.  Information provided is for informational purposes only and should not  be construed as rendering professional advice of any kind. Usage of this  posting's information is solely at reader's own risk.

Liability Disclaimer

In  no event shall Author be liable for any damages whatsoever (including,  without limitation, damages for loss of use, data or profit) arising out  of the use or inability to use the posting's information even if Author  has been advised of the possibility of such damage.


Assuming you cannot increase our multicast cap, it might be possible to shape multicast traffic (your provider might only be policing it).

Another possible solution might be to change OSPF network usage to support NBMA.  I think the latter doesn't use multicast, and if it doesn't, it wouldn't be limited to your multicast bandwidth cap.

Community Member

Re: ip ospf transmit-delay and bandwidtht

Thanks, no we cannot increase the cap (we have tried). I originally had a look at NBMA, but found the edge switch at our main site does not support it on ethernet interfaces, only broadcast and point to point. In the mean time we decided to replace OSPF with EIGRP with static neighbors, but before making such a rash decision, just want to cover all the bases. To support EIGRP (the Nexus switches does not support static neighbors either) we hade to move certain switches to the edge. But I found out now all the 4500s and 3750s we will have on the edge does support NBMA on the ethernet interfaces. Thanks for the suggestion, it made me relook at that and found we might get away with it.


CreatePlease to create content