I have 3 ONS 15305 in a SDH ring. I connected three routers with ONS via E1 ports. but i can only connect them in a point to point basis. eg. i connected R1 with ONS1 and R2 with ONS2 and i did a cross connect between SDH and E1. I am able to ping the otherend routers. but the case becomes critical when i connect another ONS in the network with another router. pl help.
Glad to see you can at least get it to ping!
I would have thought that the spanning tree on 305 switches would have prevented a loop. Check to see if it is active using the link below:
Should your last SDH connection in your previous post's list:
ONS1 wan2/14 <-> ONS3 wan2/14
ONS2 wan2/14 <-> ONS3 wan2/14?
Are the SDH circuits protected or unprotected? Are they set-up as revertive or non-revertive?
HOpe this helps!