Cell Relay Archive

[zyg@dcb.hz.zj.cn (Yige Zhu)]

Hi

I know the frame relay end device can use the link integrated message
from the LMI message to learn the remote end's status.  e.g. from
cisco router's line command "show frame-relay pvc", if it is inactive,
we can know the remote end is down or the frame relay circuit is down
in the frame relay network.

So what will happen if there is a FR ATM service internetworking
circuit? How  the LMI link integrated message is mapped with ATM OAM
cells? 

Especially if a circuit spans two different networks and the
internetworking ports of the two networks are ATM ports, like that:
end1(fr port)-- circuit in network 1 -- internetworking port of net
1(ATM port) --internetworking port of network 2(ATM port) -- circuit
in network 2 --end 2(FR port or ATM port)
how can the end 1 know its remote end's status? 

I think there are some standards to specify it. and it also depends on
the producer's implementation. I want to know how Lucent(originally
cascade and then Ascend) and New Bridge implement it in there
switches?

Thanks in advance and detailed is perfect.