If the Interface MTU field is larger than can be accepted without
fragmentation, then the packet is rejected. No acknowledgement is sent and
the behavior after that is dependent on the vendor. Usually it results in
neighbors getting stuck in Exchange or ExStart. In any case, the adjacency
will
Sorry, accidentally sent the message before I finished my response and DNS
problems to boot...
If the Interface MTU field is larger than can be accepted without
fragmentation, then the packet is rejected. No acknowledgement is sent and
the behavior after that is dependent on the vendor. Usually
PROTECTED]
Sent: Wednesday, July 16, 2003 7:34 AM
To: [EMAIL PROTECTED]
Subject: Re[3]: OSPF max Router-LSA links [7:72024]
Sorry, accidentally sent the message before I finished my response and DNS
problems to boot...
If the Interface MTU field is larger than can be accepted without
fragmentation
Young [mailto:[EMAIL PROTECTED]
Sent: Wednesday, July 16, 2003 7:34 AM
To: [EMAIL PROTECTED]
Subject: Re[3]: OSPF max Router-LSA links [7:72024]
Sorry, accidentally sent the message before I finished my response and DNS
problems to boot...
If the Interface MTU field is larger than can be accepted
MTU is not an OSPF specific value. It would be rather strange if OSPF could
adjust it dynamically to its liking.
However, a vendor could choose to implement
something that, after getting no response to DD packets, would decrease the
packet size,
How do you know you don't receive response due to
Comments inline...
*** REPLY SEPARATOR ***
On 7/12/2003 at 10:15 PM Hemingway wrote:
Zsombor Papp wrote in message
news:[EMAIL PROTECTED]
At 07:54 AM 7/12/2003 +, Hemingway wrote:
hebn wrote in message
news:[EMAIL PROTECTED]
layer 2 frame has a MTU of 1500
At 09:48 AM 7/15/2003 +, Karen E Young wrote:
KY: According to the RFC (page 99) If the Interface MTU field in the
Database Description packet indicates an IP datagram size that is larger
than the router can accept on the receiving interface without fragmentation,
the Database Description
hebn wrote in message
news:[EMAIL PROTECTED]
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)?
I've browsed through the other responses, and I did not see this particular
piece of
At 07:54 AM 7/12/2003 +, Hemingway wrote:
hebn wrote in message
news:[EMAIL PROTECTED]
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)?
I've browsed through the other responses, and
Zsombor Papp wrote in message
news:[EMAIL PROTECTED]
At 07:54 AM 7/12/2003 +, Hemingway wrote:
hebn wrote in message
news:[EMAIL PROTECTED]
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
At 10:15 PM 7/12/2003 +, Hemingway wrote:
Zsombor Papp wrote in message
news:[EMAIL PROTECTED]
At 07:54 AM 7/12/2003 +, Hemingway wrote:
hebn wrote in message
news:[EMAIL PROTECTED]
layer 2 frame has a MTU of 1500 bytes.
how does cisco router propagate router-lsa
At 5:48 AM -0700 7/10/03, Zsombor Papp wrote:
I guess our views on OSPF are slightly different.
I will now release the stage to the next how to increase the value
of the CCIE certification thread... :)
Thanks,
Zsombor
Zsombor, I appreciate the discussion. I've been running at low speed
due
At 07:41 PM 7/10/2003 +, Howard C. Berkowitz wrote:
At 5:48 AM -0700 7/10/03, Zsombor Papp wrote:
I guess our views on OSPF are slightly different.
I will now release the stage to the next how to increase the value
of the CCIE certification thread... :)
Thanks,
Zsombor
Zsombor, I
Howard C. Berkowitz wrote:
At 5:48 AM -0700 7/10/03, Zsombor Papp wrote:
I guess our views on OSPF are slightly different.
I will now release the stage to the next how to increase the
value
of the CCIE certification thread... :)
Thanks,
Zsombor
Zsombor, I appreciate the
At 2:42 AM + 7/9/03, Priscilla Oppenheimer wrote:
Howard C. Berkowitz wrote:
At 10:46 PM + 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
The original question (as I understood) was about a single LSA that is
larger than 1500 bytes (think Type 1 LSA for a router with 200 interfaces).
I can't see how such an LSA could be divided into multiple OSPF messages so
the only logical (implementation independent) solution seems to be to
hebn wrote:
hello,everyone:
OSPF use raw socket (datagram) to communicate with peers. In
general, 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)?
Well, I don't have a definite
Zsombor Papp wrote:
The original question (as I understood) was about a single LSA
that is
larger than 1500 bytes (think Type 1 LSA for a router with 200
interfaces).
I can't see how such an LSA could be divided into multiple OSPF
messages so
the only logical (implementation independent)
At 05:14 PM 7/9/2003 +, Priscilla Oppenheimer wrote:
Zsombor Papp wrote:
The original question (as I understood) was about a single LSA
that is
larger than 1500 bytes (think Type 1 LSA for a router with 200
interfaces).
I can't see how such an LSA could be divided into multiple
At 12:43 PM + 7/9/03, Zsombor Papp wrote:
The original question (as I understood) was about a single LSA that is
larger than 1500 bytes (think Type 1 LSA for a router with 200 interfaces).
I can't see how such an LSA could be divided into multiple OSPF messages so
the only logical
Howard C. Berkowitz wrote:
At 12:43 PM + 7/9/03, Zsombor Papp wrote:
The original question (as I understood) was about a single LSA
that is
larger than 1500 bytes (think Type 1 LSA for a router with 200
interfaces).
I can't see how such an LSA could be divided into multiple
OSPF
At 11:07 PM 7/9/2003 +, Howard C. Berkowitz wrote:
At 12:43 PM + 7/9/03, Zsombor Papp wrote:
The original question (as I understood) was about a single LSA that is
larger than 1500 bytes (think Type 1 LSA for a router with 200
interfaces).
I can't see how such an LSA could be divided
At 11:07 PM 7/9/2003 +, Howard C. Berkowitz wrote:
Hello packets. IIRC, about 47 router entries can fit into an OSPF
hello packet with a 1500 byte MTU. Consider the timing complexities
Btw, neighbors are identified by their 4-byte router ID, so it would take
more than 350 neighbors to
At 5:40 PM -0700 7/9/03, Zsombor Papp wrote:
At 11:07 PM 7/9/2003 +, Howard C. Berkowitz wrote:
At 12:43 PM + 7/9/03, Zsombor Papp wrote:
The original question (as I understood) was about a single LSA that is
larger than 1500 bytes (think Type 1 LSA for a router with 200
interfaces).
I
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)?
__
===
[EMAIL PROTECTED]
hebn wrote:
hello,everyone:
OSPF use raw socket (datagram) to communicate with peers. In
general, 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)?
Well, I don't have a definite
At 9:38 PM + 7/8/03, Priscilla Oppenheimer wrote:
hebn wrote:
hello,everyone:
OSPF use raw socket (datagram) to communicate with peers. In
general, layer 2 frame has a MTU of 1500 bytes.
I'm not sure I'd call it a strict datagram protocol. In some cases,
it's acknowledged
The LSA will be fragmented at the IP layer.
Thanks,
Zsombor
At 11:39 AM 7/8/2003 +, hebn 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:
At 10:46 PM + 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 original question (as I understood) was about a single LSA that is
larger than 1500 bytes (think Type 1 LSA for a router with 200 interfaces).
I can't see how such an LSA could be divided into multiple OSPF messages so
the only logical (implementation independent) solution seems to be to
Howard C. Berkowitz wrote:
At 10:46 PM + 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
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