Alcatel Unleashed

Hi;


I was reading in NSR1, that 7750 SR 12 has 12 slots, 10 for IOMs and 2 for SP/CPM.

The IOMs are hot-swappable modules responsible for queuing, processing, and forwarding of data. An IOM contains two 10-Gbps traffic-processing programmable fast-path complexes. Each complex supports a pluggable MDA that allows a common programmable fast path to support all of the possible interface types. The IOM also contains a CPU section for managing the forwarding hardware in each Flexible Fast Path (MDA).


So in simple terms does this mean:


- we have 10 slots.
- each slot has IOM
- IOM has sub-slots called FP complex
- MDA (media adapters) fit into FP complex.
- CPU on IOM controls MDA in its FP complex.


Please correct me if the understanding is correct.

Please also advise me how to address ports on each MDA, lets say if i have an MDA in slot 1. How would I refer to port 10 on that MDA in 7750 SR


cheers

Ok so here goes a quick reply

- we have 10 slots. - YES
- each slot has IOM - Each slot can take an IOM or IMM
- IOM has sub-slots called FP complex - Yes
- MDA (media adapters) fit into FP complex. Yes for IOMs
- CPU on IOM controls MDA in its FP complex. Yes

The IMMs are full blades which contain 48 ports of sfp or hard copper depending on application. The IOMs generally take up to two MDAs which are also hot swappable.

The port addressing will go as follow slot/mda/port
So you have a 4x10G card in MDA 2 of a IOM set in slot 3 and you want to address port 4? It will go 3/2/4

To correct some inaccuracies:

IOM has sub-slots called FP complex

The FP complex is not a sub-slot. It is a network processor chip on the IOM/IMM. Inside it consists of three main components: a packet processor, a traffic manager and an interface to the fabic as well as a control CPU and memory. You can see a picture of one here:
http://www3.alcatel-lucent.com/products/fp3/ or on the second page of this article http://fplreflib.findlay.co.uk/articles ... p27-28.pdf

MDA (media adapters) fit into FP complex.

They fit into the two slots on the IOMs. They are the sub-slots.

CPU on IOM controls MDA in its FP complex.

Not exactly - the brains are indeed on the IOM, the Media Dependent Adapter just contains things like the framer but as before the MDA is not in the FP complex. There is an FP complex mounted on the board inside an IOM/IMM but nothing fits into it.

The IMMs are full blades which contain 48 ports of sfp or hard copper depending on application.

That's one example of an IMM but there are others, 10GE, 40GE, 100GE, OC768, combo cards etc. IMMs are fixed configuration cards containing one or more virtual MDAs. A list of IMMs is at http://resources.alcatel-lucent.com/?cid=157829. They currently provide higher bandwidth than available by using IOMs and MDAs - the most bandwidth available to an MDA is 25Gb/s full-duplex per sub-slot in an IOM3-XP whereas current FP3-based IMMs provide 200Gb/full-duplex per slot in a chassis containing two SF/CPM4s.

See also the duplicate thread at viewtopic.php?f=364&t=21689