Direct connect a 1721 and 1760

Answered Question
Feb 11th, 2012

Hi,

I just purchased one of each of the above, both with 1ea WIC 1DSU-T1, and would like to connect them directly to each other in a lab scenario.  Do I need to have an RJ48 cable or will an RJ45 work?  I have them connected now, but they are not seeing each other. They are connected via S0 on the 1721 and S1/0 on the 1760.


This is the scenario I am using:

On 1721:

loopback 192.168.1.1/24

Fa0 172.17.1.1/24

S0 10.10.3.1/24

On 1760:

Loopback 192.168.2.1/24

Fa0/0 172.18.1.1/24

S1/0 10.10.4.1/24

On both:

router ospf 1

network 0.0.0.0 255.255.255.255 area 0

If I missed something, please let me know, or point me to where I can get some more info.

Thanks

I have this problem too.
0 votes
Correct Answer by ebarticel about 2 years 2 months ago

I just want to add that the serial interfaces on both routers needs to be configured with ip addresses in same subnet.

I see that 1721 has 10.10.3.1/24 and 1760 has 10.10.4.1/24. Choose one of subnets and use, but not both.

Hope this helps

Eugen

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mvsheik123 Sat, 02/11/2012 - 20:37

Hi,

You need T1 crossover cable to connect the WIC1DSUs. Search in your favourite engine for cable pinouts. Slightly different than Ethernet crossover.

On one side set the controller to clock source internal and the other side clock source line.

OSPF configuration is fine. It basically enables OSPF on all interfaces.

hth

MS

Correct Answer
ebarticel Sat, 02/11/2012 - 21:35

I just want to add that the serial interfaces on both routers needs to be configured with ip addresses in same subnet.

I see that 1721 has 10.10.3.1/24 and 1760 has 10.10.4.1/24. Choose one of subnets and use, but not both.

Hope this helps

Eugen

millerlw Sun, 02/12/2012 - 06:08

Thank you gentlemen, I appreciate your input.  I will get the T1 crossover and go from there.

Regards,

Leonard

mvsheik123 Sun, 02/12/2012 - 15:14

Thanks Eugen, on same subnet on the serial links. I overlooked the ip info.

Thx

MS

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Posted February 11, 2012 at 5:30 PM
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