viperm
Carpe Diem
Premium
join:2002-07-09
Winchester, CA
edit:
June 27th, @11:05PM
| Cisco ROuter and DS3 connection
Anyone ever set one up from scratch I have a Wisp friend of mine getting a DS-3 real soon and he wanted to know if I knew how to set it up?
Is it straight forward or is it complicated? I would assume the DS-3 card would be treated like any other interface? It being my WAN and the ether 0/0 being my lan port with public or private IP's on it.
I was suggesting setting it up in what I would call bridge mode and run everything thru a beefed up Mikrotik unit.
Will the ISP (phone company etc) provide us with the confgiuration info for the DS-3 interface and what not? I assume he is keeping his old IP scheme and putting the existing IP's on the new DS-3..
Any pointers would be helpful..
Thanks
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ComTrain Certified Tower Climber. American Tower Certified approved contractor. Wireless consultants. |
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AMD Phreak
Please do the needfull
Premium
join:2003-12-14 | It depends on your ISP but I would say if it is a BOC, no they will not help.
I would move this to the Cisco forum personally. I do not have any DS3 experience at this time but perhaps others might. |
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DaSneaky1D
Tell me, where is your father?
Premium,MVM
join:2001-03-29
The Lou | reply to viperm
Have they ever set up a T1 on a router? If so, it can be as easy at that.
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:: my trivial ramblings :: |
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PCInformatio
join:2004-01-12
Chandler, AZ
| reply to viperm
The ISP should provide the line coding information. Depending on how cooperative they are, sometimes they'll even give you a hand with it.
What model of Cisco?
If you like, I'll send you a config that we use in a 7200 series.
Peace,
Dan |
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mtroup
Marty
Premium
join:2007-06-28
Hermitage, AR | reply to viperm
When I ordered my T1 the AT&T Tech I spoke with gave me exact commands to type it get it going.. I would hope other's would be helpful too? |
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sporkme
drop the crantini and move it, sister
Premium,MVM
join:2000-07-01
Netcong, NJ | reply to viperm
Make sure he gets the right T3 card. There is an ATM version and a "normal" version (I think PA-A3-T3 vs. PA-T3). Not knowing what he ordered, I can't say what the telco would deliver. It's likely a clear channel T3, but it could be ATM... |
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cmaenginsb
Premium,MVM
join:2001-03-19
Palmdale, CA
| reply to viperm
Sporkme is right about the DS-3 card. I've done several links this way.
The DS-3 card in the router comes up as a serial interface. To configure it you will need the framing if it is a clear channel DS-3, this should be provided by the service provider..
The following are the only commands I use to setup a clear channel DS-3
framing c-bit
cablelength 10
dsu bandwidth 44210
serial restart-delay 0
What model router is going to be used and are they going to run BGP?
I wouldn't use bridging, after all the Cisco will do everything the MT can with respect to routing. I generally put the MT in bridge mode for the bandwidth controller.
If you really want to route, put the WAN on the DS-3 and use a /30 between the Cisco and Mikrotik.
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CCNA, Comtrain Certified Tower Climber |
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deepblackmag
join:2004-12-27
99999
edit:
June 28th, @07:56AM
| reply to viperm
Re: Cisco Router and DS3 connection
Yes, as others have stated there are various different DS3 cards.
There are channelized vs clearchannel vs ATM, but those are the ones with an internal CSU/DSU. With an external DS3 DSU such as a digital-link or larscom, you would want a HSSI port to interface with that.
The right card depends on whats going to be delivered by the telco, and what equipment he has.
I have setup many of these terminating in cisco 7200 and 7500 series. No, you dont want any other vendors router, stick with cisco for several reasons. DSU mode should be configured to match on both sides so features such as scrambling will function as desired. Unless instructed by the telco i would not configure the dsu bandwidth command, which is usually reserved for subrate DS3s.
I would deffinetly NOT count on the telco to configure it for you, or tell you how. When i was with a certain large US telco we were expressly forbidden to configure customer equipment, under threat of summary firing due to liability. Most will provide a sample configlet, but it needs to be at the very least adapted to meet the needs of the specific implementation.
Drop me a PM and ill send you my email address. There are alot of things to consider. I have seen alot of quirks with DS3s in particular especially when sent through fuji flashwaves upstream after it hits a mux. |
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battleop
join:2005-09-28
00000
| reply to viperm
Re: Cisco ROuter and DS3 connection
I've set up 3 different types of DS3s in our routers. We have a DS3 Serial Card that goes back to our upstream provider, a DS3 ATM card that goes back to AT&T to aggregate our DSL customers and a Channelized card that is used to aggregate our T1 customers.
They are not hard to configure. The hard part is making sure you have the right card. If you run into trouble you can ask here or on the cisco-nsp list and someone should be able to help you out. |
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viperm
Carpe Diem
Premium
join:2002-07-09
Winchester, CA
| reply to viperm
Thanks guys for the info... Still trying to get in touch with my buddy to get specifics on card and router I do know the card is a Cisco card and they bought something like an 8500 series router if that makes any sense. As far as the channelized I have no idea what they ordered. I assume its ON since it is going to replace or suplement their existing 20 meg connection.
As far as BGP they have not set that up nor do I think they are but I am guesing if they keep the other 20 meg they can do BGP betweem the two providers. I dont think they have an AS number or even own their own IP schemes so it will be a long list of things to accomplish to get those if they go that route..
I will keep you all posted..
--
ComTrain Certified Tower Climber. American Tower Certified approved contractor. Wireless consultants. |
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viperm
Carpe Diem
Premium
join:2002-07-09
Winchester, CA
edit:
July 1st, @08:31PM
| reply to viperm
Okay guys here is the scoop they have an existing Cisco 3825 they are going to install a Cisco Nm-1A-T3 card and its a straight DS-3 45 meg Circuit..
Here is the other info I found out.. They now have their own Arin allocated IP scheme.
I have never worked with AS stuff so I dont know where to begin. Do we have to Enable BGP in order for their AS / routing info to be "announced" thru the ISP (paetec)
IS this the correct serial DS-3 card to work with this setup??
Thanks
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ComTrain Certified Tower Climber. American Tower Certified approved contractor. Wireless consultants. |
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Believer
join:2002-07-04
Baltimore, MD
edit:
July 1st, @08:55PM
| Only the ISP can tell you if it is the correct DS3 card. However, I'd assume it's correct for a non-ATM circuit. Setting the IP address is just like setting it on any other Cisco interface:
interface Hssi2/0
ip address 4.X.X.114 255.255.255.252
ip broadcast-address 4.X.X.115
no ip directed-broadcast
no ip mroute-cache
!
Basic BGP is also easy:
router bgp <Your AS Number>
network <Your ARIN IP Address range>
ip neighbor 4.X.X.113 remote-as <Your ISP AS Number>
ip route 0.0.0.0 0.0.0.0 4.X.X.113
If you've played with a Cisco config that looks something like this, you are good to go.
--
Comtrain Certified Tower Climber |
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viperm
Carpe Diem
Premium
join:2002-07-09
Winchester, CA
edit:
July 1st, @08:47PM
| reply to viperm
Thanks B that helps so when I do a show config I should see the new card as HSSI? or will it be serial interface?
I always thought BGP was used for when you are doing multiple routes out to different ISP's providing bandwidth? so you can use it when doing one bandwidth provider e to annoucne the AS /asn Number
Where would I put their AS / ASN number in the Cisco and would Paetac also have to do something on their end as well to annouce routes his way etc?? IN other words do we have to tell paetec what the AS/ASN number is and they know what to do with it from there?
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ComTrain Certified Tower Climber. American Tower Certified approved contractor. Wireless consultants. |
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Believer
join:2002-07-04
Baltimore, MD
| Sorry, the formatting got screwed up because I used HTML type characters for where to put your information. Look at it again and it will show where to put you ASN and ISPs ASN.
BGP will announce your routes to a single ISP or multiple depending on what you put in your "router bgp" setup. If you have your own IP range, you'll need to announce it from your router and this requires BGP. Unless, you get your ISP to announce it for you.
Paetac will need to know your ASN to setup their end. Their config would look similar to yours with the other end of the IP address for the gateway and the ASNs swapped in the "router bgp" statement.
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Comtrain Certified Tower Climber |
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battleop
join:2005-09-28
00000
| reply to viperm
I think the NM-1A-T3 is an ATM card. I don't see any real advantage for you to setup BGP. If you are going to run ibgp throughout your network then run BGP. If not then just set up a default route.
If you are dealing with Paytech(USLec) then you will need all the luck in the world  |
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viperm
Carpe Diem
Premium
join:2002-07-09
Winchester, CA
edit:
July 2nd, @01:46AM
| reply to viperm
I dont know about the card but I have been reading other Cisco posts on the Cisco forum and it appears this is the correct card..
So I can announce the ASN without having to do BGP???
What would be the advantages of running IBGP or BGP (what does the I mean??) Vs not running it all. If they are not planning on keeping their other service provider would it make sense to even use BGP? I was under the impression you needed to enable it in order to announce the ASN properly?
Also how can you tell if its a DS-3 ATM version instead of the regular NON ATM version? I assume running a show config will show it as an ATM interface instead of a HSSI or Serial interface??
Thanks
--
ComTrain Certified Tower Climber. American Tower Certified approved contractor. Wireless consultants. |
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sporkme
drop the crantini and move it, sister
Premium,MVM
join:2000-07-01
Netcong, NJ
| said by viperm  :So I can announce the ASN without having to do BGP??? Yes. See your other thread as well:
»[HELP] Cisco Router configuring DS-3
Paetec is able to announce the block on your behalf, and unless they're douchebags (possible), they will do it if you ask. If you are single-homed there's no real advantage to adding a complex protocol that is not easy to fully understand into the mix.
In short, it will likely not contribute to less downtime. |
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viperm
Carpe Diem
Premium
join:2002-07-09
Winchester, CA
| reply to viperm
I guess this is paetec giving them the circuit but the bandwidth is thru SOCAL edison dark fiber etc strange!!!
but the other thing I have found out is that they have to do BGP in this router due to the fact they have a customer who they also annoucne their BGP info.
This router is already configured for that customer so I dont think it is as bad is it really seems to be.
They put in the card last night without any hitches and according to them they have sync and are now just waiting for the IP info which him and I will work on over the 4th weekend..
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ComTrain Certified Tower Climber. American Tower Certified approved contractor. Wireless consultants. |
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VariableARK
join:2003-03-17
USA | viperm I would recommend the BGP Oreilly book, I read that a few years back when we implemented BGP and it helped me out a lot! |
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viperm
Carpe Diem
Premium
join:2002-07-09
Winchester, CA | reply to viperm
I have that one alredy and was looking at it  |
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