Maximum amount of DPT nodes in an OC48 ring

[K.v.Peer]

Hi everybody,

Does anybody in this forum have an idea as to what the maximum amount of nodes is in a DPT OC48 ring? According to the Cisco website the maximum amount of nodes is 128 (assuming that only Rev-B cards are installed in the ring) but I would like to know if there's somebody out there who has seen this amount of nodes in a live implementation?

Thanks in advance for your feedback!

Cheers, Kees

[pradeepde]

For an STM-16 DPT ring :

You are limited to 62 node rings if you use the older Frame Check Sequence (FCS) version of DPT (rev-A). This is also true if you mix rev-A and rev-B versions of the DPT card.

The new limit is 128 node rings, if all your nodes use the newer version (rev-B).

For an STM-4 DPT ring :

A maximum of 30 nodes

For more information on DPT modeling and technology, refer to Dynamic Packet Transport Technology and Performance. :

http://www.cisco.com/en/US/netsol/ns341/ns396/ns223/ns226/networking_solutions_white_paper09186a0080235814.shtml