Question

How to configure Dual csu/dsu WIC cards on a 1760 cisco router to use 2 T1 lines.

Asked by: tidewaterskanska

Situation:
MPLS frame line with Sprint using a 1760 4 slot router.
Slot 0 and Slot 1 each contain a single port csu/dsu WIC. Slot 3 and 4 remain empty.
I have two T1 lines, two ISP provided ip addresses.
I only need a basic config plus the connection to the remote frame site.
I have upgraded the factory installed IOS to an PLUS IOs to support BGP and dual WICS.
I have the information needed to implement BGP.
I was given instruction to assign only one ISP address to one WIC, and create a virtual access port between the two WICS.
That doesn't make any sense to me. I would think I wold assign the ISP provided addresses to each WIC, the crete a virtual Access Port for my fastEthernet port to communicate with to allow my clients to have a gateway onto the frame line. Am I correct?

Next, how do I combine the two wics to one virtual access port, and how to make the connection between my fastethernet port and the virtual port.

I have scoured Cisco's web site for an entire day and found no sample configs and no refences to a router that uses two wic cards, I have only found a single dual port wic configuration which won't work for my situation.

Thank you in advance,
James

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Asked On: 2006-01-13 at 07:30:33ID21695503
Tags: cisco
,; wic
,; configure
,; t1
Topic: Frame Relay
Participating Experts: 2
Points: 500
Comments: 7

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Answers

by: lrmoorePosted on 2006-01-14 at 13:56:42ID: 15701993

If your ISP is providing you a "bonded" 3Mb using 2xT1's and you need to configure a Virtual Template, here is a good sample config:
http://www.cisco.com/en/US/tech/tk713/tk507/technologies_configuration_example09186a0080093d69.shtml

There is nothing that you need to create between the virtual template interface and your Fastethernet port to communicate. They will simply be two routed interfaces and traffic should flow between them. If you want to use NAT or anything like that, please post details of what you need.

by: tidewaterskanskaPosted on 2006-01-16 at 08:12:52ID: 15711785

Configure Cisco 1760 to use 2 T1's with 2 CSU/DSU Cards

If you place the above line in a search field it will bring a solution that is extremely similar to what I need. One major difference is that I have BGP enabled. I only need a basic config to be able to ping the other side of the MPLS network. This persons frame-relay encapsilatio type is IETF, I am guessing I can just change mine to MPLS?

I will post a copy of my config after I redo it based on the configuration provied above, perhaps that will give us a good starting point. I will try to post that config this afternoon or tomorrow. Today is 01.16.06

Thank you,

James

by: tidewaterskanskaPosted on 2006-01-16 at 12:56:56ID: 15714269

Here is a copy of my config and some information that was provided to me.

remarks from information provider: (I have added questions in ( ) to these instructions/remarks.

The basic commands are as follows but not complete because you will have the two T1's together as a virtual access.
You LAN segment is 10.12.57.0 255.255.255.0.

interface serial a/b (What is a/b to signify?)
ip address x.x.x.210 x.x.x.252

interface fa x/y (What is x/y to signify? I assume fa means the fast ethernet port?)
ip address 10.12.57.n 255.255.255.0 (I assume the "n" to be any number I asign from 1 to 254)

router bgp xxxxx
no auto-summary
no synchronization
neighbor x.x.x.209 remote-as xxxx
network 10.12.57.0 mask 255.255.255.0

Information provided by the ISp:
Your router ID and router interface IP address will be:
slmpls-$$$$$-1/x.x.x.210, Subnet Mask x.x.x.252 ( I assume this is the address that would go to Serial0/0)
slmpls-$$$$$-1/x.x.x.214, Subnet Mask x.x.x.252 ( I assume this is the address that would go to Serial1/0)
GLOBAL MPLS Domestic router ID and router interface IP address will be:
sl-pe3-rly/x.x.x.209, Subnet Mask x.x.x.252 ( I assume this is the ROUTE/Gateway of last resort which is actually BGP? )
sl-pe3-rly/x.x.x.213, Subnet Mask x.x.x.252 ( This looks like a second ROUTE/Gateway of last resort which makes no sense to me, wouldn't there only be one?)

SPRINT SAYS IT USES HDLC FOR ENCAPSULATION, AND PPP FOR NON CISCO ROUTERS. (when I uses PPP on serial0/0 the port was up and line protocol was up, 63 bytes sent and received. When I switched to HDLC the Line Protocol would not come up.

HERE IS THE CURRENT CONFIG.

show run
Building configuration...

Current configuration : 828 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname Tidewater_MPLS
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
!
resource policy
!
mmi polling-interval 60
no mmi auto-configure
no mmi pvc
mmi snmp-timeout 180
!
--More-- !
!
!
ip cef
!
!
!
!
interface FastEthernet0/0
ip address 10.12.57.13 255.255.255.0
speed auto
!
interface Serial0/0
ip address 172.20.134.210 255.255.255.252
encapsulation ppp
!
interface Serial1/0
ip address 172.20.134.214 255.255.255.252
encapsulation ppp
!
router bgp 64515
no synchronization
bgp log-neighbor-changes
--More-- network 10.12.57.0 mask 255.255.255.0
neighbor 172.20.134.209 remote-as 1803
no auto-summary
!
no ip http server
!
!
!
!
!
control-plane
!
!
line con 0
line aux 0
line vty 0 4
login
!
end

Thank you in advance for you time and patience.

James

by: lrmoorePosted on 2006-01-16 at 13:10:54ID: 15714403

>interface serial a/b (What is a/b to signify?)
Serial 0/0 ; 1/0 etc

Try this:

interface Serial0/0
ip address 172.20.134.210 255.255.255.252
no encapsulation ppp
!
interface Serial1/0
ip address 172.20.134.214 255.255.255.252
no encapsulation ppp
!
ip cef
!
ip route 0.0.0.0 0.0.0.0 172.20.134.209
ip route 0.0.0.0 0.0.0.0 172.20.134.213
!
Keep your BGP configuration as is.

I'm afraid that you are not getting a 'bonded' link but rather two equal-cost routes. You will still get total throughput, failover and redundancy, but no single connection over 1.5Mb

>SPRINT SAYS IT USES HDLC FOR ENCAPSULATION
There is NO OPTION to use a multilink virtual-templace using HDLC. You *must* use PPP. This is why I say you are not getting what you may have thought you were getting.

by: tidewaterskanskaPosted on 2006-01-19 at 07:42:48ID: 15739624

I can't ping the routes. I have an AL light on one csu/dsu. The line protocols will not come up. Here is the current config with seriala/b output and show IP route which states the gateway of last resort is not set? Sprint says they tested the lines as far as they could and that the problem is with my csu/dsu (s) which they cannot get to. Any more ideas? Thank you in advance. James.

show run
Building configuration...

Current configuration : 870 bytes
!
version 12.4
service timestamps debug datetime msec
service timestamps log datetime msec
no service password-encryption
!
hostname Tidewater_MPLS
!
boot-start-marker
boot-end-marker
!
!
no aaa new-model
!
resource policy
!
mmi polling-interval 60
no mmi auto-configure
no mmi pvc
mmi snmp-timeout 180
!
!
!
!
ip cef
!
!
!
!
interface FastEthernet0/0
ip address 10.12.57.13 255.255.255.0
speed auto
!
interface Serial0/0
ip address 172.20.134.210 255.255.255.252
!
interface Serial1/0
ip address 172.20.134.214 255.255.255.252
!
router bgp 64515
no synchronization
bgp log-neighbor-changes
network 10.12.57.0 mask 255.255.255.0
neighbor 172.20.134.209 remote-as 1803
no auto-summary
!
ip route 0.0.0.0 0.0.0.0 172.20.134.209
ip route 0.0.0.0 0.0.0.0 172.20.134.213
no ip http server
!
!
!
!
!
control-plane
!
!
line con 0
line aux 0
line vty 0 4
login
!
end

Tidewater_MPLS#show interface serial0/0
Serial0/0 is up, line protocol is down
Hardware is PQUICC with Fractional T1 CSU/DSU
Internet address is 172.20.134.210/30
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation HDLC, loopback not set
Keepalive set (10 sec)
Last input 00:00:01, output 00:00:00, output hang never
Last clearing of "show interface" counters 00:05:24
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/1/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
Available Bandwidth 1158 kilobits/sec
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
64 packets input, 1909 bytes, 0 no buffer
Received 64 broadcasts, 0 runts, 0 giants, 0 throttles
7 input errors, 0 CRC, 7 frame, 0 overrun, 0 ignored, 0 abort
39 packets output, 1325 bytes, 0 underruns
0 output errors, 0 collisions, 12 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DCD=up DSR=up DTR=up RTS=up CTS=up

Tidewater_MPLS#show interface serial1/0
Serial1/0 is down, line protocol is down
Hardware is PQUICC with Fractional T1 CSU/DSU
Internet address is 172.20.134.214/30
MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation HDLC, loopback not set
Keepalive set (10 sec)
Last input 01:52:33, output 01:52:36, output hang never
Last clearing of "show interface" counters 00:04:25
Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
Queueing strategy: weighted fair
Output queue: 0/1000/64/0 (size/max total/threshold/drops)
Conversations 0/1/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
Available Bandwidth 1158 kilobits/sec
5 minute input rate 0 bits/sec, 0 packets/sec
5 minute output rate 0 bits/sec, 0 packets/sec
0 packets input, 0 bytes, 0 no buffer
Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
0 packets output, 0 bytes, 0 underruns
0 output errors, 0 collisions, 9 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DCD=down DSR=up DTR=up RTS=up CTS=down

Tidewater_MPLS#show ip route
Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2
i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2
ia - IS-IS inter area, * - candidate default, U - per-user static route
o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

Tidewater_MPLS#

by: lrmoorePosted on 2006-01-19 at 10:45:10ID: 15741437

>Serial0/0 is up, line protocol is down
>Serial1/0 is down, line protocol is down
> I have an AL light on one csu/dsu

Does not look like the telco has enabled these T1's properly. I would call them and make them stay on the phone with me until I was satisfied.

Unless/until they are enabled and up/up you will not see any routes

by: harbor235Posted on 2006-02-01 at 05:54:20ID: 15843085

MLPPP is very CPU intensive, I would be very suprised if you don't experinece problems with your router after your circuits are straightened oout.

harbor235 ;}

20120131-EE-VQP-002

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How to configure Dual csu/dsu WIC cards on a 1760 cisco router to use 2 T1 lines.

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