[c-nsp] Best practice in configuring internet access services.

[Shakeel Ahmad]

First of all , WAO you gotta a big Ethernet Metro...Perhaps you should
concider moving on to a higher chasis like 6500 series which can perform
almos tall L3 operations with high availability. terminating VLANs on router
*in this big network* will not be wise in my opinion as you have already
faced the limitation of ACL's....


Shakeel


On 10/4/06, Alex A. Pavlenko <lex at sandy.ru> wrote:
>
> Colleagues!
>
> Is there a common approach or best practice in providing internet access
> services on Cisco router?
> This question is quite general so let me to concrete it with my current
> network as an example.
> So there are few thousands of home customers(max 8000) connected to
> Ethernet rings on the access layer. On the distribution layer those rings
> are
> aggregated on 3560G switch at layer 2.
> Router is connected to aggregation switch and performs layer 3 operations
> such as intervlan routing access control, NAT, traffic-shaping or
> rate-limiting, netflow export,
> may be DHCP. All customers are devided to groups of 256 or less, each
> group is one VLAN
> trminated on a router Ethernet subinterface. This scheme has a lot of
> issues. For example
> there are IOS configuration lmitations. I mean if I'm going  to limit
> bandwidth in per
> customer basis i have to specify an ACL with customers IP address to put
> it in a traffic-shape
> or rate-limit statement, however only 700 numbered access-lists can be
> configured on a router :(
> May be there are common approaches to configure routers and switches for
> similar network layout
> and services? I know about PPPoE but i think it is more aplicable in DSL
> access networks,
> not in Ethernet.
> Thanks for any ideas.
>
> --
> Alex Pavlenko
> System Administrator
> Sandy Info
>
>
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