We have DC and DR site, And NAP locations. Each nap has 2 routers which are having 2 Fastethernets connectivity is as per attached diagram.
At one Nap location we are having application server which is accessed by all other naps through Internet explorer.
Now for perticular one Nap application wont work if traffic flows on NAP to DC link while on other Naps it works .
But if we shut the NAP to DC link application works properly on DR link. (i.e for perticular NAP if traffic flows on DC link application won't work for the same NAP it works if traffic flow on DR link)
So we have to keep DC link shut for application to work.
We observed that if we bring up DC link and try to access the application it generates CRC errors an input erros on link
on NAP side.
(If this perticular application is accessed and if the DR link is shut application won't open and it generates
the CRC errors and input errors But if DC link is shut on dr link it works properly )
At DC and DR side we are having STM and on NAP side we are having Chanalized Even having 2 Mbps connectivity.
pl Help us What could be the problem ?