Re: [RPRWG] A question on IP over RPR
Speaking with my Cisco Hat on,
we have received so much customer feedback that RPR should have
the hooks in to allow layer 3 to control / select various things
like ring selection. I believe the standard should allow either
layer 2 or layer 3 to control it. When layer 3 knows some things
about what is going on below, it can make better decisions.
mike
> I am wondering, if the ring management should be left to RPR layer only. It is very similar to Link aggregation (802.3ad) which
> also provides fault tolerance.
>
> Regards,
> Devendra Tripathi
> VidyaWeb (India) Pvt Ltd.
> (Subsidiary of CoVisible Solutions Inc.)
> Pune, India
> Tel: +91-20-433-1362
>
> -----Original Message-----
> From: owner-stds-802-17@xxxxxxxxxxxxxxxxxx [mailto:owner-stds-802-17@xxxxxxxxxxxxxxxxxx]On Behalf Of
> Jim Forster
> Sent: Thursday, January 31, 2002 10:57 PM
> To: lcwang@xxxxxxx; stds-802-17@xxxxxxxx
> Subject: RE: [RPRWG] A question on IP over RPR
>
> Briefly, the L3 (IP) to L2 (RPR) binding is very similar to that on Ethernet, with an extension. IP on Ethernet uses
> ARP to determine the MAC address corresponding to the next-hop IP address. On RPR we need this but we also
> need a direction bit, or Ring ID -- which Ring, Inner or Outer to use. So ARP proceeds pretty much like on
> Ethernet to determine the next-hop MAC address. Then RPR topology information is consulted to determine
> which ring to use, and the result stored along with the IP-MAC address binding information.
>
> -- Jim
>
> -----Original Message-----
> From: owner-stds-802-17@xxxxxxxxxxxxxxxxxx
> [mailto:owner-stds-802-17@xxxxxxxxxxxxxxxxxx]On Behalf Of lcwang@xxxxxxx
> Sent: Thursday, January 31, 2002 1:12 AM
> To: stds-802-17@xxxxxxxx
> Subject: [RPRWG] A question on IP over RPR
> Importance: High
>
> A question of IP over RPR.
>
> According to IP address, using routing protocol, a data forwarding route can be selected. On
> the other hand, RPR may transfer data through
> its ring on both direction. How can consistency of L3 and L2 data transfer be guaranteed?
>
> Can someone explian this? Thanks.
>
> Leo Wang
>
>
>
>
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--
Michael Takefman tak@xxxxxxxxx
Manager of Engineering, Cisco Systems
Chair IEEE 802.17 Stds WG
2000 Innovation Dr, Ottawa, Canada, K2K 3E8
voice: 613-254-3399 fax: 613-254-4867