[c-nsp] 10G for 6506-E with Sup32-8Gb or replace with 4900M

[Keegan Holley]

I don't think you can do the 1G distribution on the 4900M without converting the 10G interfaces back to dual 1G.  I have heard from others on the list that this severely limits your queue sizes but. Ymmv.  Beating the multi-vendor drum this is a perfect use for the juniper ex4200 series.  I have been giving my cisco se a hard time because they don't have an all fiber stackable with dual power that can do 10G.  The ex will give you 24 fiber ports with 2 10G per switch for about 10k list.  I know this is A cisco list but it's what I'd use.  I have a hunch that they do this by design to force us to buy chassis based switches.

In your situation I'd check when the sup32 goes eos/eol.  You may be dodging a bullet by upgrading to the 720.



Sent from my iPhone

On Dec 23, 2010, at 9:05 AM, Holemans Wim <wim.holemans at ua.ac.be> wrote:

> We have 3 campus with on each campus a 6506-E/Sup720-10G as 'master router' and a 6506/E-Sup32-8gbit as backup router, in a HSRP config. In each router we also have GBIC boards to connect the different buildings. These Sup32 routers also act as  L2 concentrator for part of each campus.
> 
> Now we are thinking about connecting both routers to each other on each campus with a 10G connection. As the Sup32 don't have a 10G yet, we have multiple options to do so.
> We can add a 10G board to the chassis, replace the supervisor with a Sup720 or replace the whole router with a 4900M.
> If I take a look at listprices, I get 28000$ for Sup720, 20000$ for 6704 (but these are Xenpacks), 37500$ for 6708 and 22000$ for 4900M (base + 10/100/1000 card, dual power).
> We have  65XX as routers because we had FWSM boards in them  but these are not used anymore.
> Based on the price, it seems we best opt to replace the 6506-E/Sup32 with the 4900M option (there is also a difference in maintenance cost). With Twingig convertors this offers us  a good combination of 10G and 1G SFP ports. For 7500$ we can add a second 8 port X2 board that gives us extra 10G/SFP-ports if needed.
> 
> Has anyone had bad/good experience with using a 4900M as router, given the following environment :
> 
> -          Router acts as backup router, so in 99.xxx% of the time it only has to forward L2 traffic
> 
> -          Only static routes, no active routing protocol.
> 
> -          40 vlans, 40 SVI's with ACLs on it
> 
> -          No IPv6 for the moment, but according to the specs, the 4900M should handle IPv6 in hardware just fine.
> 
> -          No Qos yet, but we are planning to implement that in 2011
> 
> 
> I know we lose the netflow capability if the primary router fails, but we can live with that.
> 
> All comments are welcome.
> 
> Wim Holemans
> Network Services
> University of Antwerp
> Belgium
> 
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