Re: MPLS Echo Packet containing FEC stack change Sub-TLV in DDMAP TLV is not decoded by wireshark or https://hpd.gasmi.net/

[Jaap Keuter <jaap.keuter () xs4all nl>]

Hi,

The immediate response by Alexis was to open an issue on the Wireshark issue tracker.
My response would be to attach a small sample capture file with the packets, instead of some bytes or screenshot to the 
email.

Can you do either of those?

Jaap


> On 6 Jan 2022, at 06:31, max payne.. <pankaj.knitcs1 () gmail com> wrote:
>
> Hi Team,
>
> I have not got the resolution for the issue below.
>
> This was the link provided to me.
> https://www.wireshark.org/mailman/confirm/wireshark-dev/d4b89dd02f824a954e2e3ffa37151bf0f7ebacbc 
> <https://www.wireshark.org/mailman/confirm/wireshark-dev/d4b89dd02f824a954e2e3ffa37151bf0f7ebacbc>
>
> On Fri, Dec 3, 2021 at 12:27 AM max payne.. <pankaj.knitcs1 () gmail com <mailto:pankaj.knitcs1 () gmail com>> wrote:
> Hi,
>
> This is to inform you that we are supporting FEC Stack Change Sub-TLV in DDMAP TLV. I have Hex Dump, which is correct 
> as per my understanding but it is not getting decoded on Wireshark or Online Decoder.
>
> Please let me know if the latest Wireshark  "Version 3.6.0 (v3.6.0-0-g3a34e44d02c9)" supports the following (RFC 8029 
>  3.4.1.3 <https://datatracker.ietf.org/doc/html/rfc8029#section-3.4.1.3>. FEC Stack Change Sub-TLV) :-
> 1) Multiple FEC stack change sub-TLV in DDMap TLV, whereas single FEC stack change TLV is decoded properly. Please 
> find the HEX dump below.
> 2) FEC stack change sub-TLV along with FEC stack sub-TLV in DDMap TLV is not decoded properly. Please find the HEX 
> dump below.
>
> I am having following HEX Dump, which is not getting decoded properly on wireshark or online decoder 
> "https://hpd.gasmi.net/ <https://hpd.gasmi.net/>"
>
>
> Two  FEC stack Sub-TLV in DDMAP TLV not decoded properly on wireshark or on https://hpd.gasmi.net/ 
> <https://hpd.gasmi.net/>
> Ethernet:   18 92 a4 55 71 04 00 23 8a fb c2 04 81 00 00 d4
> 08 00 
>
> IP: 45 00 
> IP Len: 00 68
> 71 a5 00 00 ff 11 29 a4 07 07
> 07 07 09 09 09 09 
>
> UDP: 0d af 0d af 
> UPD Len: 00 54
> a8 b1 
>
> ECHO: 00 01
> 00 00 02 02 08 02 00 00 00 16 00 00 00 03 e4 ae
> 50 eb 6f c5 47 9d e4 ae 50 eb 70 2a dc 4c 
>
> DDMAP: 00 14 00 28 
> 05 dc 01 02 d2 01 01 01 d2 01 01 01 00 00
> SUB-Len: 00 18 
>               
> Stack-chg Type: 00 03 00 08 
> Value : 02 01 00 00 
> 06 06 06 06
>
> Stack-chg Type: 00 03 00 08
> Value : 02 01 00 00 
> 07 07 07 07
>
> FEC stack change sub-TLV with FEC sub-TLV (IGP IPV4 Prefix Segment TLV) not decoded properly on wireshark or on 
> https://hpd.gasmi.net/ <https://hpd.gasmi.net/>.
>
> Ethernet:   18 92 a4 55 71 04 00 23 8a fb c2 04 81 00 00 d4
> 08 00 
>
> IP: 45 00 
> IP Len: 00 68
> 71 a5 00 00 ff 11 29 a4 07 07
> 07 07 09 09 09 09 
>
> UDP: 0d af 0d af 
> UPD Len: 00 54
> a8 b1 
>
> ECHO: 00 01
> 00 00 02 02 08 02 00 00 00 16 00 00 00 03 e4 ae
> 50 eb 6f c5 47 9d e4 ae 50 eb 70 2a dc 4c 
>
> DDMAP: 00 14 00 28
> 05 dc 01 02 d2 01 01 01 d2 01 01 01 00 00
> SUB-Len: 00 18 
>               
> Stack-chg Type: 00 03 00 08 
> Value : 02 01 0c 00 
> 06 06 06 06
>
> FEC TLV Type: 00 0e 00 08
> Value : 01 01 01 01 
>  20 00 00 00
>
> Whereas multiple Label-Stack sub-TLV in DDMap TLV is getting properly decoded on https://hpd.gasmi.net/ 
> <https://hpd.gasmi.net/>
> Ethernet: 18 92 a4 55 71 04 00 23 8a fb c2 04 81 00 00 d4
> 08 00 
>
> IP: 45 00 
> IP Len: 00 60
> 71 a5 00 00 ff 11 29 a4 07 07
> 07 07 09 09 09 09 
>
> UDP: 0d af 0d af 
> UPD Len: 00 4C
> a8 b1
>
> MPLS Echo: 00 01
> 00 00 02 02 08 02 00 00 00 16 00 00 00 03 e4 ae
> 50 eb 6f c5 47 9d e4 ae 50 eb 70 2a dc 4c 
>
> DDMAP: 00 14 00 20 
> 05 dc 01 02 d2 01 01 01 d2 01 01 01 00 00
> SUB-Len: 00 10 
>                 
> Label-S: 00 02 00 04 
> 00 00 30 06
>
> Label-S: 00 02 00 04 
> 00 00 30 06
>
> -- 
> Pankaj Verma
>
>
> -- 
> Pankaj Verma
> ___________________________________________________________________________
> Sent via:    Wireshark-dev mailing list <wireshark-dev () wireshark org>
> Archives:    https://www.wireshark.org/lists/wireshark-dev
> Unsubscribe: https://www.wireshark.org/mailman/options/wireshark-dev
>             mailto:wireshark-dev-request () wireshark org?subject=unsubscribe

___________________________________________________________________________
Sent via:    Wireshark-dev mailing list <wireshark-dev () wireshark org>
Archives:    https://www.wireshark.org/lists/wireshark-dev
Unsubscribe: https://www.wireshark.org/mailman/options/wireshark-dev
             mailto:wireshark-dev-request () wireshark org?subject=unsubscribe