Re: SUA routing contexts
"Ambika Tripathy" <[email protected]>
| Newsgroups | gmane.ietf.sigtran |
|---|---|
| Message-ID | <[email protected]> |
Hi Brain,
Can I expect the same sequence number from the peer's CLDT message that i
have sent just to that end?
-------------------CLDT-----------------> Sequence Number = 23
<------------------CLDT------------------- Is it the peer will encode
the 23 here in the sequence Number field or encode the value as per its
implementation.
br,
Ambika
On 6/19/07, Brian F. G. Bidulock <[email protected]> wrote:
>
> Steve,
>
> Steve Hill wrote: (Tue, 19 Jun 2007
> 14:47:36)
> >
> > In IPSP operation it is my understanding that the sending AS and
> receiving
> > AS do not both need to be assigned the same routing context number. For
> > example:
> >
> > AS (rc = 1)
> > |
> > ASP 10.0.0.1:14001
> > *
> > *
> > *
> > ASP 10.0.0.2:14001
> > / \
> > AS (rc = 2) AS (rc = 3)
> >
> > In the above case, the AS at 10.0.0.1 can send messages to both the ASs
> at
> > 10.0.0.2, despite the routing context numbers being different. As such,
> > the routing context parameter in the CLDT message always identifies the
> > destination AS, not the source AS.
>
> The above is true only for IPSP DE mode, where the RC represents only a
> _single_ direction of traffic flow. For IPSP SE mode, there can only
> be one RC between a pair of (local and remote) AS, representing _both_
> directions of traffic flow.
>
> > My question is regarding how the routing context parameter should be
> used
> > when sending to an SG. The parameter is listed as mandatory, but when
> > sending to an SG I am unclear on what value should be placed in the
> > parameter since there is no concept of a destination routing context?
>
> The ASP-SG mode is the same as the IPSP SE mode: there can only be one RC
> value between an AS and an SGP, again representing _both_ directions of
> traffic flow.
>
> This is really no different for SUA than it is for M3UA.
>
> --brian
>
> --
> Brian F. G. Bidulock
> [email protected]
> http://www.openss7.org/
>
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>
--
Br,
Ambika Prasad Tripathy
Nethawk Networks
Cell: +91-94375 47730
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