Cisco 1900 series router with 3xT1 links

[fsebera]

Anyone know if the Cisco 1900 series routers will support 3 serial T1 links?

I see th 1900 series routers have 2 WAN slots (EHWIC) and was thinking we could install a dual T1 card in one EHWIC slot and a single T1 card in the other slot.

Any ideas?

We will also want to utilize Multilink Frame Relay (MFR) to aggregate the links.

Thanks

Frank

[craigbruenderman · Accepted solution]

Sure they will. Grab a 1941 and put 2 HWIC-2T's in it. Bingo, 4 T1s.

Stay away from HWIC-4, I have timing slips with them. Must be too crowded on the board.

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[fsebera]

Craig,

Thanks!

BTW, any idea what sort of routing table it would hold? Perhaps 1000 v4 and 1000 v6 routes?

Happy Day

Frank

[Alessio Andreoli · Accepted solution]

Hi Frank,

1000v4 plus 1000v6 is a kind of shame!!!! The 1941 can host many routes more! I actually know about 1 1941 with max RAM memory running with full BGP table... Stay away to repeat this experiment but it did work fine... If your concern is 2x1000 routes routing tables then be happy with the 1900 series. Stay away from the 1921 if you want to set 3xT1 links , better a little bit of margin with these technologies. And they are not that expensive.

Take care

Alessio

[fsebera]

Good information!! Thanks.

Not sure what you mean about the . . . . . "Stay away from the 1921 if your want....."

Could you elaborate PLEASE?

Tks

Frank

[Alessio Andreoli · Accepted solution]

1921 has some limitations that in a 3xT1 context could be important in the evolution of your network. Better spending now 200 dollars more and feeling safe than having to buy a new machine in the near future !!!

Alessio

Sent from Cisco Technical Support iPad App

[fsebera]

Ahhh, yes future growth. Our plan is a max of 3 T1s at any remote site. If a remote site needs additional bandwidth, we move to a less costly DS3 link which will require a different router anyway.

Since the 1941 router will support 3 T1s and cost 1/6 of a 2900 series, we feel this is a better deal for us.

Of course an eval unit will help this decision.

Thanks again for your guidence and help

Please make any suggestions on the 1941 you like, we wanna make the right decision.

THANKS

Frank

[Joseph W. Doherty · Accepted solution]

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Posting

BTW, Cisco recommends the 1941 for WANs up to 25 Mbps, and documents it maximum performance up to 2.9 Gbps.  The latter is very best case, but the former is generally very conservative.  So if you go beyond 3 T1s, you might find you don't need to replace it with a faster router quite as soon as you might have thought.

[fsebera]

The decision to upgrade from 3 T1s is purely a financial decision. It turns out to be cheaper (monthly Telecom charges, installation and new router) to move to a DS3. AND 6Mbps costing more the 45Mbps is crazy talk.

The main thing I was concerned about was the physical/logical support of 3 T1s and a 2000 prefix routing table (v4/v6) support with this small remote site router. Keep in mind we are not looking at redundancy as we only have a single router anyway.

Much good information, THANKS!!!

Frank