Re: Network Design

just an example of a design going to production

PE1----CE1 CE2----PE2
            | |
            | |
            | |
          SW1-----------trunk-------------SW2
             | |
  server farms site 1 server farms site 2

CE's in the same AS run eBGP to the same provider AS, SW's are RR
using different cluster-id's the servers point to their respective
HSRP VIP these vlans are advertised into the SW's BGP process, I'm
using MED on the CE's to control inbound preference and using WEIGHT
inbound on the SW's peering with the CE's to ensure symmetrical
routing, end result if CE1 link goes down then routing is available
via CE2---SW2----SW1---server farms and vice versa

This is enterprise level and admit it's not on a big scale but it works ok

BR

Tony

On 31 March 2013 04:02, <aaron1_at_gvtc.com> wrote:
> How do you run dual L3 wan links with lan-side fhrp and maintain routing symmetry?
>
> ....and routing symmetry during fhrp failover...?
>
> Aaron
> ----- Original Message -----
> From: Tony Singh <mothafungla_at_gmail.com>
> To: Cisco Fanatic <ebay_products_at_hotmail.com>
> Cc: ccielab_at_groupstudy.com
> Sent: Sat, 30 Mar 2013 22:54:24 -0400 (EDT)
> Subject: Re: Network Design
> is their a WAN that the 3945 connects to? does it run BGP?
> a good design IMO is something that has dual links & meshed to account
> for single link/device failure scenarios, but is engineered enough to
> ensure no asymmetric routing /. routing blackholes and routing loops,
> run FHRP consider that your inbound/outbound routing or east to west
> is tested prior to production
> if you have the 3750-x then get two this makes them stackable and one
> less problem should the single device fail
> BR
> Tony
> On 31 March 2013 03:44, Cisco Fanatic <ebay_products_at_hotmail.com> wrote:
>> My company hired a contractor who is a CCIE and I have learned some good
>> things from him. But, still one question which I am not able to understand and
>> can't get an answer for - What is considered a good network design? The answer
>> I always get is "it depends". Understand that, so let me simplify in layman
>> terms so that I can grasp the concept ...
>> What is recommended if say you have a router (say 3945), a switch (say 6509)
>> and access switches (3750x). How does this fit in "The Cisco Three-Layered
>> Hierarchical Model".
>> Should I consider 3945 as Core and 6509 as Distribution and configure
>> InterVLAN routing on the 6509, OR, it's the other way around?
>> -yuri
>>
>>
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Received on Sun Mar 31 2013 - 04:11:58 ART