HSSI Interfaces

[kokulsharma]

Hi all,

I am having a problem in connecting HSSI cable back to back for 2 Cisco 7206 routers. I ve configured the interfaces as below.

RouterA:

interface Hssi6/0

ip address 192.168.1.1 255.255.255.252

load-interval 30

hssi dce

serial restart-delay 0

clockrate 17280000

fair-queue

RouterB:

interface Hssi1/0

ip address 192.168.1.2 255.255.255.252

load-interval 30

fair-queue

hssi internal-clock

serial restart-delay 0

We loaded the downlink first and then the Uplink. Ths issue is heavy packet drops at the interface when loading uplink.

Appreciate if anyone can help me in this.....

Regards,

Kokulan

[jackyoung]

Did you hit this Field Notice ?

http://www.cisco.com/en/US/products/hw/modules/ps2033/products_field_notice09186a0080094c8b.shtml

Could you please provide the show interface & show diag screen capture ? As I remember, it is very simple to configure the back-to-back HSSI connection.

Do you mean the uplink/downlink is the traffic flow direction ?

Do you have spare cable for replacement ?

Can you try to use different clockrate and test again ?

Hope this helps.

[pciaccio]

You say that you are running these routers back-to-back. I see that you are supplying clock on both routers. On router B remove the hssi internal-clock statement from it. Only one device needs to supply clock. You would need to set Router B for external clock...See if that helps you....Please rate...

[jackyoung]

According to below example, there is such command in the sample. However, it is no harm to remove it and test again.

http://www.cisco.com/en/US/products/hw/modules/ps2033/products_configuration_example09186a0080094a8d.shtml

Hope this helps.

[azhibetty]

? it's so easy isn't it? good luck!

[kokulsharma]

Hi,

I just remove the clock at one side and check. Interface is getting down....

:-)

[jackyoung]

Therefore, please follow the example and suggestion to test again. Wait for your update.

[kokulsharma]

Hi Jackyoung,

I ve configured the HSSI cables as mentioned in the example, is there any difference u see??

Thanks,

Kokulan

[jackyoung]

In fact, the config. is similar. Did you try to use different clockrate and test again ?

And do you have spare cable to swap and test again ?

It is very simple and I can't find the reason why it is not working.