Trunking is designed to turn multiple identical cables into a single ISL. For multiple "cost" links, it's better to have one trunk on the short path, one on the long path, and then adjust the cost of the link so that the only time the long path gets used is if the short one is dead.
Thanks for the reply. But our problem is we have Fabric A and B , each fabric is connected with one long path and one short path so incase one path fails we don't loose connectivity to the fabric.
Is there any other solution available without redesigning the path. ?.
first, as be mention by CanadianStorage, in order to create a Trunk, the cable distance should have same leght, by a couple of meter difference is really not a problem, however you have here 15 KM difference....
second, show to me both path coming from different carrier or are distributed trough different line resource.
All this make any such Trunking design as not realizable.
back to you last question:
--->>>Is there any other solution available without redesigning the path. ?.
you can try to implement DPS / EBR = Dynamic Path Selection / Exchange Basic Routing, but I'm not sure if this work or not by such a distance.
keep in mind, you must disable / set off Trunking feature by the Port in Question on both Switch Side, Local and Remote.
@sivakumar.saravanamuthu wrote:Thanks for the reply. But our problem is we have Fabric A and B , each fabric is connected with one long path and one short path so incase one path fails we don't loose connectivity to the fabric. Is there any other solution available without redesigning the path. ?.
In this situation, if you have only one link on each path, you don't use trunking at all. You simply control which link is primary by adjusting the cost of using the linkcost command.
first, sivakumar ask for another solution, and the only one available - however I've a doubt that any such work - is DPS/EBR
second, from a Redundance point of view, DPS/EBR is a for Free low cost of Trunking.
and Finally, in order to realized any such redundance, Trunking is not mandatory at all , and btw the correct definition of Trunking or the goal to create a Trunk consist to Bundle TWO or More Port/Path
there is an Option.
Perform D_Port Test on the longer Link and write down the real distance.
Then Perform D_Port Test on shorter link and write down the real distance.
Now buy a SMF with a length of the difference of the two meaurements and wrap it on a spool.
Then insert it in the shortest Path.
Thats it !!
Thanks Ralf. Now ball is on management court for decesion making to invest extra 30,000 dollars.
Thanks everyone for helping me.