Veerendranath,
On 19/08/2020 10:03, Veerendranatha Reddy V wrote:
Hi Peter,
It is not related to SRMS.
If there exist ISIS/OSPF or two instances of OSPF in same device, and all are
supporting ST, then I can redistribute SR Prefix information to OSPF from other
OSPF instance or from ISIS.
yes, you can.
In this case, I may use range TLV to reduce the number of Prefix TLVs, by using
Range TLV, if prefixes and SID are able to convert to Range TLV.
you would have to generate one somewhere (on ABR?), but it would not be
of NSSA type.
Peter
Thanks & Regards,
Veerendranath
-----Original Message-----
From: Peter Psenak <ppsenak=40cisco....@dmarc.ietf.org>
Sent: Wednesday, August 19, 2020 1:23 PM
To: Veerendranatha Reddy V <veerendranatha.redd...@ericsson.com>; lsr@ietf.org
Subject: Re: [Lsr] Regarding OSPF Extended Prefix Range TLV usage for
External/NSSA prefixes defined in RFC 8665
Hi Veerendranatha,
On 19/08/2020 06:23, Veerendranatha Reddy V wrote:
Hi Peter,
While redistributing prefix Sid for the prefixes from other protocols (Ex: from
ISIS or other OSPF instances), we can consider as range TLV for the prefixes
which are advertised in the range TLV in that protocol.
I don't follow. Are you talking about redistribution of SRMS advertisement
between protocols? Such thing has not been defined.
thanks,
Peter
If it is NSSA, then we need to advertise these redistributed prefixes as area
scope, so Range TLV also need to be part of area scope Opaque LSA.
Thanks & Regards,
Veerendranath
-----Original Message-----
From: Peter Psenak <ppsenak=40cisco....@dmarc.ietf.org>
Sent: Tuesday, August 18, 2020 11:06 PM
To: Veerendranatha Reddy V <veerendranatha.redd...@ericsson.com>;
lsr@ietf.org
Subject: Re: [Lsr] Regarding OSPF Extended Prefix Range TLV usage for
External/NSSA prefixes defined in RFC 8665
Veerendranath,
On 18/08/2020 16:40, Veerendranatha Reddy V wrote:
Hi Authors, All,
OSPF Extended Prefix Range TLV defined in RFC 8665 has IA flag to
distinguish between Intra and Inter Area scope prefixes.
Whether any restrictions to not to use Prefix Range TLV for
external/NSSA prefixes ?
I don't see how you can use OSPF Extended Prefix Range TLV for NSSA, the usage
of OSPF Extended Prefix Range TLV has only been defined in the context of RFC
8665.
thanks,
Peter
For External Prefixes, we can able to use Prefix Range TLV by using
LSA type (based on AS scope Opaque Type , so the TLV is for External
Prefixes)
But If we need to use the Prefix Range TLV for NSSA prefixes (Type-7)
, which are in area scope, there is no flag/route-type field in this
TLV to distinguish between Intra or NSSA prefixes( as IA flag will
not be set anyway).
Thanks & Regards,
Veerendranath
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