Yes, that's true. TLV's #22 and #135 are used to carry information needed for MPLS TE however, in order to enable these TLV's on a cisco router, wide metric support is required... http://www.cisco.com/univercd/cc/td/doc/product/software/ios120/120newft/120 t/120t7/te120_7t.htm#xtocid214168 Cheers, -Michael Cohen -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of Peter Van Oene Sent: Saturday, May 26, 2001 1:02 AM To: [EMAIL PROTECTED] Subject: RE: Isn't MPLS basically just ATM PNNI, but for layer 3? [7:6015] A small correction. Traffic engineering databases are populated via new TLV's in IS-IS (see Draft-ietf-isis-traffic-0x.txt). Wide metric support is not required. *********** REPLY SEPARATOR *********** On 5/25/2001 at 12:06 PM Michael Cohen wrote: >Quite right. RSVP-TE is only for path creation and setup. Actual >bandwidth >allocation information is disseminated to all TE devices using the IGP >(OSPF >Opaque LSA's and IS-IS wide metrics). This also leads to the current >limitation of only running MPLS-TE within a single area of the link state >IGP since the bandwidth information doesn't cross area boundaries. Each >head end of TE tunnels should know what bandwidth is available through the >entire tunnel path prior to RSVP signaling. > >Cheers, > >-Michael Cohen > >-----Original Message----- >From: Irwin Lazar [mailto:[EMAIL PROTECTED]] >Sent: Friday, May 25, 2001 10:25 AM >To: 'Michael Cohen'; [EMAIL PROTECTED] >Subject: RE: Isn't MPLS basically just ATM PNNI, but for layer 3? >[7:5765] > > >Just to clarify, most other vendors are now heading down the RSVP-TE road >for MPLS LDP provisioning (or at the very least, they are agreeing to >support RSVP-TE). The RSVP-TE vs. CR-LDP argument seems to finally be >dying >down. > >It should be noted that RSVP-TE is only for path creation and setup, it >doesn't perform the same role as was envisioned for IntServ. > >If anyone is interested in comparing the two protocols, Data Connection has >a good white paper on their site, which I link to from the MPLS Resource >Center - www.mplsrc.com. > > >Irwin > > >-----Original Message----- >From: Michael Cohen [mailto:[EMAIL PROTECTED]] >Sent: Thursday, May 24, 2001 2:17 PM >To: [EMAIL PROTECTED] >Subject: RE: Isn't MPLS basically just ATM PNNI, but for layer 3? >[7:5765] > > >I think there might be some confusion as to where RSVP and CR-LDP are being >used. Steve is correct in saying that Cisco is using RSVP and most other >vendors are using CR-LDP for Traffic Engineering. Cisco is also using the >proprietary TDP to distribute tags in their MPLS solution while other >vendors are conforming to the MPLS standard LDP. Cisco does support LDP >for >tag distribution in their 12.0.10ST and higher software and plans on >deploying it in 12.2T for availability on most platforms. I haven't heard >Cisco planning support for CR-LDP with Traffic Engineering in the near >future... > >-Mike > >-----Original Message----- >From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of >Stephen Skinner >Sent: Thursday, May 24, 2001 12:13 PM >To: [EMAIL PROTECTED] >Subject: RE: Isn't MPLS basically just ATM PNNI, but for layer 3? >[7:5758] > > >guys, > >thanks for your imput ..... > >yes i was loosely discribing MPLS ...it does have all the functions you >state... and more , > >i must be mistaken about the RVSP because i seem to remeber reading >somewhere that cisco is favoring RSVP....and that there LDP is based on >this > >but hey i must be mistaken ......... > >also the RFC you list does not come up as valid ont the ITEF...please can >you re-send this > >many thanks > >steve >>From: "Marc-Andre Giroux" >>Reply-To: "Marc-Andre Giroux" >>To: [EMAIL PROTECTED] >>Subject: RE: Isn't MPLS basically just ATM PNNI, but for layer 3? [7:5723] >>Date: Thu, 24 May 2001 08:56:43 -0400 >> >>Steve, >> MPLS is alot more then just ATM PNNI at layer 3. Your statement is >>semi true when talking about MPLS VPN's the concept does come from ATM but >>there is so much more you can do with it go read on traffic engineering, >>the >>fish bowl effect, valued added services (VPNs) and the network protection. >> >> As for your other statement saying that cisco uses RSVP and everyone >>else doesn't. This also is wrong. Cisco uses TDP wich is a label >>distribution protocol that is proprietary but they also support the >>standard >>LDP (RFC 3630) that Juniper and Everyone else are supporting. Juniper >>personnaly doesn't have as much support for LDP then RSVP-TE (rsvp has >>existed for a couple of years its the TE extensions that are used in >>Traffic >>engineering). But when you start talking about this be sure to know what >>you >>are talking about. BTW you can't use LDP or TDP to do MPLS >>traffic-Engineering ( and this is the killer app of MPLS). >> >> I hope this clarifies a few things, I also hope you don't take this >>the wrong way but go read on the juniper site about RSVP-TE it will >clarify >>alot of things for you. Hope this was helpfull and if you have any >>questions >>don't be shy. >> >> >>-----Original Message----- >>From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of >>Stephen Skinner >>Sent: May 24, 2001 3:37 AM >>To: [EMAIL PROTECTED] >>Subject: Re: Isn't MPLS basically just ATM PNNI, but for layer 3? >>[7:5703] >> >> >>hi, >> >>i to have been reading alot and working with MPLS..... >> >>i personally liken it to Switching more than routing >>...i know it uses BGP and also uses static routes,but essentially it just >>switches packets over pre-defined paths from device to device ....... >> >>I also see a future for this simply in the Telco enviroment ....everyone >>(cisco Juni and foundry are supporting it ...albeit in different >>forms..cisc >> >>is using RSVP and everyone else isn`t) and the speed increases seem to be >>worth it.... >> >> >>but as ever only my workload and time will tell. >> >>steve >> >> >> >From: "nrf" >> >Reply-To: "nrf" >> >To: [EMAIL PROTECTED] >> >Subject: Isn't MPLS basically just ATM PNNI, but for layer 3? [7:5660] >> >Date: Wed, 23 May 2001 21:18:21 -0400 >> > >> >I would like to hear some opinions on MPLS. I have been reading about >>it, >> >and, pardon me if I'm wrong, but it seems to me like just a reinvention >>of >> >ATM PNNI. >> > >> >I would be very interested in hearing some comments on the future of >>MPLS. >> >Particularly since ATM PNNI seemed to have gotten nowhere with the >telcos >> >(and I still don't completely understand why not), then why is MPLS >going >> >to >> >do any better (or is it)? >> > >> >I would be particularly interested in hearing Howard Berkowitz's opinion >>on >> >the future of MPLS. >> > >> >Thanx >> >FAQ, list archives, and subscription info: >> >http://www.groupstudy.com/list/cisco.html >> >Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] >> >>_________________________________________________________________________ >>Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. >>FAQ, list archives, and subscription info: >>http://www.groupstudy.com/list/cisco.html >>Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] >>FAQ, list archives, and subscription info: >>http://www.groupstudy.com/list/cisco.html >>Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] > >_________________________________________________________________________ >Get Your Private, Free E-mail from MSN Hotmail at http://www.hotmail.com. >FAQ, list archives, and subscription info: >http://www.groupstudy.com/list/cisco.html >Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] >FAQ, list archives, and subscription info: >http://www.groupstudy.com/list/cisco.html >Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] >FAQ, list archives, and subscription info: >http://www.groupstudy.com/list/cisco.html >Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED] Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=6026&t=6026 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
