[rbridge] ????: ????: rbridge for ipv6 ?
Vishwas Manral
Vishwas at sinett.com
Mon Sep 19 21:48:18 PDT 2005
Hi Yiou,
> I think running a routing protocol like IS-IS is a big burden for
> lan switches.
Are you talking about CPU/ Memory or both?
Routing protocols (IS-IS/ OSPF) have an inbuilt hierarchy, that way we can run the networks as different areas, thus not overburdening certain Rbridges. Besides STP/ RSTP/ MSTP already run in the switching domain, which would probably be replaced by the RP.
Thanks,
Vishwas
-----Original Message-----
From: rbridge-bounces at postel.org [mailto:rbridge-bounces at postel.org] On Behalf Of Joe Touch
Sent: Tuesday, September 20, 2005 9:38 AM
To: Developing a hybrid router/bridge.
Subject: Re: [rbridge] ????: ????: rbridge for ipv6 ?
Yiou Deng wrote:
> Hi Vishwas,
> Thanks a lot for your information. It's helpful for me to understand
> more about rbridge.
> Another doubt for me is that, will protocols other than ROUTING
> PROTOCOLS be considered to use in rbridge? I think running a routing
> protocol like IS-IS is a big burden for lan switches. Yes, we can say
> that rbridge campus is a layer-2 CORE network and switches in it are all
> middle-end or high-end switches which can afford to run IS-IS. But as
> the network expands, or the application requirement changes, more
> switches may be added into rbridge campus. For example, if end to end TE
> tunnels are to be established over L2 network, not only switches in the
> core network, but also the ones in the access layer, will be required to
> run routing protocol like IS-IS.
> Is there any consideration for this issue in rbridge?
Tunnels over L2 through an rbridge campus see the campus as a single L2
device (a single bridge), and thus would not need to participate in
IS-IS since they are outside the campus.
Additional devices can be added to an rbridge'd network either by adding
bridges outside the rbridge, by expanding the rbridge campus, or by
adding a separate rbridge campus. The first option does not require
IS-IS devices.
Joe
> Thanks & Regards,
> Yiou
> -----邮件原件-----
> 发件人: rbridge-bounces at postel.org [mailto:rbridge-bounces at postel.org]
> 代表 Vishwas Manral
> 发送时间: 2005年9月19日 12:27
> 收件人: Developing a hybrid router/bridge.
> 主题: Re: [rbridge] ????: ????: rbridge for ipv6 ?
>
> Hi Yiou,
>
> I am not sure if IS-IS is the preferred protocol (I guess we are
> some distance from finalizing a protocol), however one advantage of
> IS-IS is that it uses TLV based reachability information and hence is
> independent of the protocol for which it carries information (It was
> initially used for the OSI stack and later extended to work for TCP/IP).
>
> Besides IS-IS already works over Layer-2.
>
> Thanks,
> Vishwas
> -----Original Message-----
> From: rbridge-bounces at postel.org [mailto:rbridge-bounces at postel.org]
> On Behalf Of Yiou Deng
> Sent: Monday, September 19, 2005 9:33 AM
> To: 'Developing a hybrid router/bridge.'
> Subject: [rbridge] ????: ????: rbridge for ipv6 ?
>
> Hi Ganesh,
> I mean that ANY of the routing protocols can be used for rbridge
> reachability. I'm new for this mailing list and know little about
> why
> ISIS is preferred for rbridge. Will anyone be kind enough to explain
> this for me? Thanks in advance.
>
> Regards,
> Yiou
> -----邮件原件-----
> 发件人: rbridge-bounces at postel.org
> [mailto:rbridge-bounces at postel.org]
> 代表 Ganesh CS
> 发送时间: 2005年9月14日 22:45
> 收件人: Developing a hybrid router/bridge.
> 主题: Re: [rbridge] ????: rbridge for ipv6 ?
>
> Hi Yiou,
> Do you mean that still routing protocols other than IS-IS
> routing
> are
> required just for rbrige reachability ?
>
> regs
> Ganesh
>
> Yiou Deng wrote:
>
> > Hello!!
> > Rbridge network is just like a L2VPN network formed by IP
> or
> MPLS,
> >the only use of routing protocols in Rbridge is to ensure the
> >connectivity of Rbridge network internally.
> >
> > Maybe we can talk face to face at Kuike building if any
> doubts
> still
> >there :-)
> >
> > Yiou
> > -----邮件原件-----
> >发件人: rbridge-bounces at postel.org
> [mailto:rbridge-bounces at postel.org]
> >代表 Yang Yang
> >发送时间: 2005年9月14日 0:36
> >收件人: 'Developing a hybrid router/bridge.'
> >主题: Re: [rbridge] rbridge for ipv6 ?
> >
> > Hi,
> > Rbridge forwards frames based on L2 address in data
> plane.
> But it
> >uses
> > routing protocols which may operate at L3 in control plane.
> If
> L3
> >address is
> > used, is Rbridge a L2 device? And I think IPv4 and IPv6
> should
> both
> >be
> > supported.
> > Still now, I am not sure whether the routing protocol
> can
> use MAC
> >address
> > via adding a new TLV in IS-IS.
> >
> > Best Regards!
> > Yang Yang
> >
> > -----Original Message-----
> > From: rbridge-bounces at postel.org
> [mailto:rbridge-bounces at postel.org]
> >On
> > Behalf Of Joe Touch
> > Sent: Wednesday, September 14, 2005 12:01 AM
> > To: Developing a hybrid router/bridge.
> > Subject: Re: [rbridge] rbridge for ipv6 ?
> >
> > Rbridge is an L2 device; at the ingress, it should be
> capable
> of
> >peeking
> > into various packets for optimization like other L2
> systems, e.
> g.,
> >for
> > multicast. This includes IPv4 and IPv6, but these are just
> >optimizations
> > - if not implemented, it should not affect correct
> operation.
> >
> > Joe
> >
> > Ganesh CS wrote:
> > > Hi all,
> > > Is rbridge for ipv6 under consideration ?
> > >
> > > Ganesh
> > > _______________________________________________
> > >
>
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