Re: [Lsr] RFC4750: OSPF Version 2 Management Information Base

"Acee Lindem (acee)" <acee@cisco.com> Wed, 09 December 2020 13:39 UTC

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From: "Acee Lindem (acee)" <acee@cisco.com>
To: Muthu Arul Mozhi Perumal <muthu.arul@gmail.com>, "Acee Lindem (acee)" <acee=40cisco.com@dmarc.ietf.org>
CC: "lsr@ietf.org" <lsr@ietf.org>, Tulasi Rami Reddy N <tulasi.ietf@gmail.com>
Thread-Topic: [Lsr] RFC4750: OSPF Version 2 Management Information Base
Thread-Index: AQHWzhooOYp2kYdVF0aJwvR9API7uKnum9CA///GmICAAFyygP//slaA
Date: Wed, 9 Dec 2020 13:39:37 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/lsr/vuU-FPGiE1JHy2jA0aNw7DSDF2U>
Subject: Re: [Lsr] RFC4750: OSPF Version 2 Management Information Base
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Hi Muthu,
There isn’t a specific case for this specific error so I wouldn’t reuse the any of the specific ones with the trap. Like I said, some implementations don’t generate any OSPF MIB trap for this case. What are you doing today?
Thanks,
Acee

From: Lsr <lsr-bounces@ietf.org> on behalf of Muthu Arul Mozhi Perumal <muthu.arul@gmail.com>
Date: Wednesday, December 9, 2020 at 8:18 AM
To: "Acee Lindem (acee)" <acee=40cisco.com@dmarc.ietf.org>
Cc: "lsr@ietf.org" <lsr@ietf.org>rg>, Tulasi Rami Reddy N <tulasi.ietf@gmail.com>
Subject: Re: [Lsr] RFC4750: OSPF Version 2 Management Information Base

Hi Acee,

This is a configuration error, right? Wouldn't ospfIfConfigError trap be more appropriate? There is no good error code for this case in ospfConfigErrorType, though. Perhaps, RFC4750 could have reserved some error codes for future definitions?

Regards,
Muthu

On Wed, Dec 9, 2020 at 6:16 PM Acee Lindem (acee) <acee=40cisco.com@dmarc.ietf.org<mailto:40cisco.com@dmarc.ietf.org>> wrote:
Hi Tulasi,
You definitely shouldn’t generate the netMaskMismatch trap as this is for mask mismatch detection on hello packets. You could generate the ospfIfRxBadPacket but many do not for this case.
Thanks,
Acee

From: Lsr <lsr-bounces@ietf.org<mailto:lsr-bounces@ietf.org>> on behalf of Tulasi Rami Reddy N <tulasi.ietf@gmail.com<mailto:tulasi.ietf@gmail.com>>
Date: Wednesday, December 9, 2020 at 6:11 AM
To: "lsr@ietf.org<mailto:lsr@ietf.org>" <lsr@ietf.org<mailto:lsr@ietf.org>>
Subject: Re: [Lsr] RFC4750: OSPF Version 2 Management Information Base

[ Sorry, My previous mail was truncated]
Hi ,

OSPFv2 adjacency will be formed on a numbered LAN only below both conditions are met:
           1. Common IP subnet
           2. Matching network mask.
From the OSPFv2 MIB, there is only one error defined.

     ospfConfigErrorType OBJECT-TYPE
          SYNTAX       INTEGER {

                          netMaskMismatch (7),
           }

I believe this is for the case 2 (when mask is mismatched).

Let's take below example:

  RTA    (11.1.1.2/24<http://11.1.1.2/24>)   --------     (10.1.1.1/24<http://10.1.1.1/24>) RTB

Here, src IP is not matching to the Rx interface IP subnet, then what is the error type to be set?
Should this be considered as generic input processing error and only generate
ospfIfRxBadPacket notification or netMaskMismatch  notification?
Should we need a new type here?

"
The generic input processing of OSPF packets will
have checked the validity of the IP header and the OSPF packet
header."



Thanks,
Tulasi.
On Wed, Dec 9, 2020 at 4:27 PM Tulasi Rami Reddy N <tulasi.ietf@gmail.com<mailto:tulasi.ietf@gmail.com>> wrote:
Hi ,

OSPFv2 adjacency will be formed on a numbered LAN only when
           1. Common IP subnet
2.matching network mask.
From the

Thanks,
TUlasi.
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