Re: [rbridge] draft-tissa-trill-oam-03 : ICMP vs RFC 4379 message channel

The number one concern I hear from Users about anything UDP is that it can
be dropped and is stateless. (big issue with VXLAN) As this is the same for
ICMP I see no practical difference to the User which one is used.

On Fri, Mar 2, 2012 at 10:47 AM, Sam Aldrin <aldrin.ietf@gmail.com> wrote:

> Do not have much preference of reusing the same port or not. With a
> programmer hat on, who developed rfc4379 and it's implementation, it will
> be klugy, and have issues when process is/was implemented in h.w. For ex:
> had issue with vccv when used by lsp ping and bfd, due to incompatible
> hardware in the network.
> Having said that, idea is to use similar message or tlv formats, will help
> immensely in adopting the standard.
>
> Cheers
> Sam
>
> Sent from my iPad
>
> On Mar 2, 2012, at 10:11 AM, Vishwas Manral <vishwas.ietf@gmail.com>
> wrote:
>
> Hi Tissa,
>
> I am not sure we would want to use the same port for de-multiplexing MPLS
> OAM and UDP based TRILL OAM packets.
>
> On another note, I do know that folks use different channels for testing
> real application behavior in current networks. So yes UDP based channels
> should be good too.
>
> My biggest concern is that we should not have different message formats
> when the application works over different layers. It is for that reason
> that BFD has been so successful (the same message format/ state machine)
> irrespective of the lower layer protocol.
>
> Thanks,
> Vishwas
>
> On Fri, Mar 2, 2012 at 8:08 AM, Tissa Senevirathne (tsenevir) <
> tsenevir@cisco.com> wrote:
>
>> Dear All****
>>
>> ** **
>>
>> Current draft-tissa-till-oam utilize ICMP extensions defined in RFC 4884.
>> I have also heard preference of using UDP based messaging channel defined
>> in RFC 4379.****
>>
>> ** **
>>
>> Advantage of using RFC 4379 methods is we can utilize the same framework
>> and OAM challenges in TRILL and MPLS world are similar. However, we need to
>> define new TLV series and message types. Question arise whether we should
>> use the same wellknown UDP port used in MPLS OAM or a use a different UDP
>> port.****
>>
>> ** **
>>
>> Advantage of ICMP method is we are utilizing the ICMP infrastructure that
>> is commonly utilized in IP world. However, we need to define RFC 4884
>> extensions and it also heavily depends on acceptance of individual
>> submission draft-shen-traceroute-ping-ext-04.****
>>
>> ** **
>>
>> Would like to see the preference from the WG on specific method over the
>> other ?****
>>
>> ** **
>>
>> Thanks****
>>
>> Tissa****
>>
>>
> _______________________________________________
> rbridge mailing list
> rbridge@postel.org
> http://mailman.postel.org/mailman/listinfo/rbridge
>
>
> _______________________________________________
> rbridge mailing list
> rbridge@postel.org
> http://mailman.postel.org/mailman/listinfo/rbridge
>
>

-- 
"Do not lie. And do not do what you hate."