Howard C. Berkowitz wrote:
> 
> At 10:46 PM +0000 7/8/03, Zsombor Papp wrote:
> >The LSA will be fragmented at the IP layer.
> 
> Do you know for certain this is what Cisco's implementation
> does?
> The OSPF code is aware of the MTU and can build OSPF packets
> for it.
> I don't think you're really going to simplify it by relieving
> it of
> the need to keep track of lengths.

Can you think of a good way to test it in a lab??

The RFC says that dividing up the updates is recomended over letting IP do
the fragmentation and Cisco is generally good at doing things the
recommended way usually.

Priscilla


> 
> On the other hand, if you send a LSupdate that is at the MTU,
> the
> receiving router can immediately start checking and installing
> it in
> the LSDB, without waiting for fragments. This allows some
> concurrency
> between OSPF packet transmission and OSPF protocol processing.
> 
> >At 11:39 AM 7/8/2003 +0000, hebn9999 wrote:
> >>layer 2 frame has a MTU of 1500 bytes.
> >>     how does cisco router propagate router-lsa whose size
> exceed 1500
> >  >bytes(more than 122 links in one area)?
> 
> 




Message Posted at:
http://www.groupstudy.com/form/read.php?f=7&i=72047&t=72024
--------------------------------------------------
FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]

Reply via email to