Point to Point configuration between 2620 and 1720 routers

[UNIX72]

Hello all, We have in our main site a Cisco 2620 router with a dual T1 Wic (3Mb) connection to our ISP. I need to configure a point to point connection from our remote site to the 2620. The remote site is using a 1720 with a single T1DSU Wic card. I'm installing a single T1 DSU Wic on the 2620 which has an available slot. Ideal solution is to route everybody's data on the remote end to our main site, so they care share our new 3Mb internet line. The 2620 router is not doing nat, we have a firewall with a external and internal interface. How will I point the remote clients to know the firewall gateway? Can anybody post any configs or links on how to setup both routers, thanks so much who helps.

 

[MauricioD]

get on your 1720 router go to enable mode and type
sho run and post this back
also

sh diag andpost this as well


on your 2620 do a sho run and post this as well

Mauricio
MCP, MCSE, SMS 2.0, DCSE, CCNA, CCNP, CCIE Written

 

[UNIX72]

I sure will, thks for the suggestion MauricioD

 

[UNIX72]

I need to further elaborate, our main network is a 192.168.1.0 and the remote subnet is 192.168.2.0. On the main site the default gateway for the client computer's is the internal ip address of the firewall. Ideally I want the remote subnet to use the existing firewall for internet usage. Finally, should i use the existing 2620 to do the point to point configuration. I have an extra router for this implementation at the main end. Please advise, thanks so much

 

[MauricioD]

are you using a routing protocol like EIGRP?

Mauricio
MCP, MCSE, SMS 2.0, DCSE, CCNA, CCNP, CCIE Written

 

[UNIX72]

Which router, the one for the internet or point to point? As far as im concern no not using EIGRP. Do you think I should use the existing 2620 router or use a second router for the point to point? thanks

 

[MauricioD]

any how sounds like you need something like this on the remote side

ip dhcp pool 1
network 192.168.2.0 255.255.255.0
dns-server 192.168.x.x
default-router 192.168.2.1
netbios-name-server 192.168.x.x
domain-name xxxxxx
!

!
!
!
!
interface FastEthernet0
description LAn for users
ip address 192.168.2.1 255.255.255.0
ip directed-broadcast
speed auto
!
interface Serial0
description link to main site
ip address 192.168.x.x 255.255.255.252<-?
ip directed-broadcast
!

!
ip classless
ip route 0.0.0.0 0.0.0.0 192.168.x.x route everything to the s0 inteface of the main office
ip http server

Mauricio
MCP, MCSE, SMS 2.0, DCSE, CCNA, CCNP, CCIE Written

 

[UNIX72]

Thanks MauricioD for all your suggestions, I will keep you posted.

 

[UNIX72]

Im assuming I have to configure the serial interfaces on the T1's, does anybody have any examples. I want to test the serial interfaces from both sites. Please advise, thank you

 

[MauricioD]

interface Serial0
description remote
ip address 192.168.35.78 255.255.255.252

ip route 0.0.0.0 0.0.0.0 192.168.35.77



---------------------------------------------------------
interface Serial0
description main site
ip address 192.168.35.77 255.255.255.252


Mauricio
MCP, MCSE, SMS 2.0, DCSE, CCNA, CCNP, CCIE Written

 

[UNIX72]

MauricioD I appreciated all the suggestions you have provided. Don't I have to configure the framing and line coding and clock speed on the T1's? Thanks

 

[MauricioD]

depends if your using a seperate csu/dsu device thats in between your router and ISp

or is it cleaned from the providor?

your using straight point to point T1 right?

which one is the dce or dte?

or does your router use a WIC ?
do the sh diag on the router

Mauricio
MCP, MCSE, SMS 2.0, DCSE, CCNA, CCNP, CCIE Written

 

[UNIX72]

Both routers will be using the WIC-1DSU-T1 modules. We will be using striaght point to point. I'll post the sh diag on each router.

 

[kbing]

Unix72,

If this Point2Point (P2P) line is a standard P2P line, framing will = ESF and line coding will be B8ZS.

In Cisco, these are default configuration.

Beware, that you may need to configure 1 side of your P2P to have the clock source = line and the other end configured for clock source = internal.

I recommend that your main hub site be configured for clock=internal and your remote clock = line. Helps keep it straight if you keep the clocking on one end.

 

[UNIX72]

Interface serial 0/0
service-module t1 clock source internal
service-module t1 timeslots 1-24 speed 64
service-module t1 framing esf
service-module t1 linecode b8zs
ip address 10.1.1.1 255.255.255.0
encapsulation ppp
fair-que
no shut

Are these the exact commands I need to do on each router? THanks

 

[UNIX72]

updated status, Both routers on each end the serial interfaces are down. I'm posting the capture screen from a terminal connection from both routers. I'm assuming our telco company is in fault.

Main router 2610

Router>ena
Router#sh inter s0/0
Serial0/0 is down, line protocol is down
Hardware is PQUICC with Fractional T1 CSU/DSU
Internet address is 10.1.1.1/30
MTU 1500 bytes, BW 1536 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation PPP, loopback not set
Keepalive set (10 sec)
LCP Closed
Closed: IPCP, CDPCP
Last input never, output never, output hang never
Last clearing of "show interface" counters 00:05:36
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 0/0/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
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, 13 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DCD=down DSR=up DTR=up RTS=up CTS=down

Router#sh run
Building configuration...

Current configuration:
!
version 12.1
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname Router
!
!
!
!
!
!
ip subnet-zero
!
!
!
!
interface Ethernet0/0
no ip address
shutdown
interface Serial0/0
ip address 10.1.1.1 255.255.255.252
encapsulation ppp
service-module t1 clock source internal
service-module t1 timeslots 1-24

ip classless
ip http server
line con 0
transport input none
line aux 0
line vty 0 4

Remote Router 1721

outer#sh inter s0/0
Serial0/0 is down, line protocol is down
Hardware is PQUICC with Fractional T1 CSU/DSU
Internet address is 10.1.1.1/30
MTU 1500 bytes, BW 1536 Kbit, DLY 20000 usec,
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation PPP, loopback not set
Keepalive set (10 sec)
LCP Closed
Closed: IPCP, CDPCP
Last input never, output never, output hang never
Last clearing of "show interface" counters 00:05:36
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 0/0/256 (active/max active/max total)
Reserved Conversations 0/0 (allocated/max allocated)
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, 13 interface resets
0 output buffer failures, 0 output buffers swapped out
0 carrier transitions
DCD=down DSR=up DTR=up RTS=up CTS=down

Router#sh run
Building configuration...

Current configuration:
!
version 12.1
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname Router
!
!
!
!
!
!
ip subnet-zero
!
!
!
!
interface Ethernet0/0
no ip address
shutdown
interface Serial0/0
ip address 10.1.1.1 255.255.255.252
encapsulation ppp
service-module t1 clock source internal
service-module t1 timeslots 1-24

ip classless
ip http server
line con 0
transport input none
line aux 0
line vty 0 4

no scheduler allocate


The telco company is telling the lines are fine. Please advise, thank you.

 

[kbing]

Can the vendor perform a loopback test from the CO to both the routers at each end? When they put the interface in loopback mode, you should see the interface come up/up. When they take the loopback off it will go back down.

Read this document on how to troubleshoot serial lines.

http://www.cisco.com/univercd/cc/td/doc/cisintwk/itg_v1/tr1915.htm#wp1020545

 

[kbing]

I also noticed that you IP scheme won't work on the T1. Both ends are configured for 10.1.1.1. You'll need to change one end to 10.1.1.2 for traffic to pass once the Line issues are resolved.

Have you tried putting the main router service module clocking to line and leaving the other end to internal?

 

[MauricioD]

type
sh ip int brie
and post

still need the
sho diag

Mauricio
MCP, MCSE, SMS 2.0, DCSE, CCNA, CCNP, CCIE Written

 

[DanInRaleigh]

..you know its to bad you dont have two spare routers lying around to perform lab testing...with interfaces..do you?





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