From: Brian McGahan (bmcgahan@internetworkexpert.com)
Date: Thu Aug 23 2007 - 22:29:26 ART
Hi Brian,
The "S" trains are "Service Provider" trains, which in general means
that they are the most stable, lack enterprise features, and include more SP
features such as MPLS. For example if you compare a Service Provider
platform and release, such as a 7200 running the latest 12.0S release, vs an
Enterprise platform and release, such as a 3825 running the latest 12.4
release, on the feature navigator you'll be surprised which supports what:
Features Unique to c7200-k4p-mz.120-32.S7.bin:
Any Transport over MPLS
Layer 2 Local Switching (ATM to Ethernet / ATM to Frame Relay / etc.)
MPLS Traffic Engineering Fast Reroute
etc.
Features Unique to c3825-adventerprisek9-mz.124-16.bin:
AutoQoS
AutoSecure
Cisco IOS Certificate Server
Command Scheduler (Kron)
DHCP (Server / Client)
DLSw+
DNS Proxy
Easy VPN
Firewall Feature Set
IP SLA
IPSec
IPv6
NAT
NBAR PDLMs
etc.
Check http://www.cisco.com/go/fn for more info.
HTH,
Brian McGahan, CCIE #8593 (R&S/SP/Security)
bmcgahan@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-224-8987 x 705
Outside US: 775-826-4344 x 705
24/7 Support: http://forum.internetworkexpert.com
Live Chat: http://www.internetworkexpert.com/chat/
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Jensen, Brian D.
Sent: Thursday, August 23, 2007 7:43 PM
To: Cisco certification
Cc: Brian McGahan
Subject: RE: Question for you ISP guys:
Hi Everyone,
Today a person who works on the ISP side asked me a question (I work
enterprise). He asked why I didn't use the "S" train code everywhere
instead of the Mainline or "T" train code I had in production. I thought
this is a great question, since he thought that "S" train was better all
around. Is it? What are the main differences?
TIA!
Brian
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Mounir Mohamed
Sent: Thursday, August 23, 2007 7:02 PM
To: Gabriel Nunes
Cc: Mohamed M Moustafa; C SAMARTH; Gregory Gombas; Cisco certification;
Brian McGahan
Subject: Re: Question for you ISP guys
HI Gabriel,
It's not VPN-MPLS terminology ONLY,PE and P is a terminology for any
MPLS implementations, So why did u reserve it for only one application
(MPLS-VPN) actually if am providing MPLS-ATOM i will call my gears PE
and P as soon as they imposing and deposing labels. so the Guy (Mohamed)
was talking about MPLS benefits so it's clear that he meaning MPLS
applications.
Best Regards,
Mounir Mohamed
On 8/23/07, Gabriel Nunes <gabriel.nunes@gmail.com> wrote:
>
> Hi Mohamed,
>
> P and PE belongs to VPN MPLS terminology. If you have an ISP backbone
> where you don't have MP-BGP running, you don't have P and PE routers.
> In this case you would have an MPLS core backbone only with probaly a
> Traffic Engineering...
>
> Gabriel Nunes
> CCIE#17737
>
>
> On 8/23/07, Mohamed M Moustafa <mmma@gawab.com> wrote:
> >
> > Hi,
> >
> > As Brian has stated, only the core routers (P routers) are not
> > running
> BGP
> > as they only do label switching but the edge routers (PE routers)
> > still need to run BGP, this is always the case of an MPLS backbone
> > providers, but all the routers needs to run IGP (most commonly ISIS
> > or OSPF), before
> even
> > MPLS can operate, and the first benefit of MPLS is that the core
> > routers needs not a full internet routing table as they just do
> > label switching, and then comes all the advanced features of MPLS.
> >
> > HTH,
> > Mohammed Mahmoud.
> >
> >
> > C SAMARTH <samarth_04@hotmail.com> wrote on 23 Aug 2007, 08:08 PM:
> > Subject: RE: Question for you ISP guys
> > >Has any of the ISP's completely stopped running any BGP in their
> > >core
> and
> > >running only MPLS + IGP there?
> > >
> > >Best Wishes,
> > >SAMARTH
> > >CCIE #18535
> > >
> > >> From: bmcgahan@internetworkexpert.com> To: ggombas@gmail.com;
> > >ccielab@groupstudy.com> Subject: RE: Question for you ISP guys>
Date:
> > Thu,
> > >23
> > >Aug 2007 11:34:39 -0500> > A lot of large providers run IS-IS as
> > >their
> > IGP,
> > >BGP at the edge,> and then MPLS in the core. Running MPLS not only
> > enables
> > >advanced services> like traffic engineering and L2/L3 VPNs, it also
> > removes
> > >the requirement of> transit devices having to carry the full public
> > >BGP table.
> > >It works this> way because the MPLS enabled routers don't need to
> > >know
> > what
> > >the final> destination of a packet is, only what the exit point
> > >is.> > HTH,> > Brian McGahan, CCIE #8593 (R&S/SP/Security)>
> > >bmcgahan@internetworkexpert.com >
> > >> Internetwork Expert, Inc.> http://www.InternetworkExpert.com>
> > >> Toll
> > Free:
> > >877-224-8987 x 705> Outside US: 775-826-4344 x 705> 24/7 Support:
> > >http://forum.internetworkexpert.com> Live Chat:
> > >http://www.internetworkexpert.com/chat/> > > > -----Original
> > Message----->
> > >>
> > >From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On
> > >Behalf
> Of>
> > >
> > >Gregory Gombas> > Sent: Thursday, August 23, 2007 10:37 AM> > To:
> > >Cisco
> > >certification> > Subject: Question for you ISP guys> > > > For
> > >certification> > those of
> > you
> > >with ISP experience, can you tell me what routing> > protocols do
> service
> > >providers typicall run within their AS?> > > > Do you have every
> > >single router running BGP? I can't imagine> > redistributing 225k+>
> > >> routes into an
> > IGP,
> > >so
> > >how do you pass these routes withing your AS?> > > > If you are
> > >using
> > iBGP
> > >what are you using to transmit next hop> > information (as iBGP
> > >does
> not
> > >normally update the next hop of the> > external AS)?> > > > Can
> > >someone point me to some documentation showing typical ISP routing>
> > >> design?> > > > Thanks,> > Greg> > > >
> >
> >_____________________________________________________________________
> >__>
> > >
> > >Subscription information may be found at:> >
> > >http://www.groupstudy.com/list/CCIELab.html> >
> >
> >_____________________________________________________________________
> >__>
> > >Subscription information may be found at: >
> > >http://www.groupstudy.com/list/CCIELab.html
> > >
> > >___________________________________________________________________
> > >____ Subscription information may be found at:
> > >http://www.groupstudy.com/list/CCIELab.html
> > >
> >
> > ---------------------------------------------
> > Free POP3 Email from www.Gawab.com
> > Sign up NOW and get your account @gawab.com!!
> >
> > ____________________________________________________________________
> > ___ Subscription information may be found at:
> > http://www.groupstudy.com/list/CCIELab.html
>
> ______________________________________________________________________
> _ Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
>
-- Best Reagrds, Mounir Mohamed
This archive was generated by hypermail 2.1.4 : Sat Sep 01 2007 - 11:32:13 ART