Frame Relay LMI

[fsoffia]

hallo,

what are the advantages in using LMI type Cisco rather than ANSI or Q933a in Frame Relay ?

thanks

francesco

[pkhatri]

These days, there isn't much of an advantage. Even the Cisco MGX switches support all three methods now.

If anything, the preferred approach is q933a since it is standards-based.

However, for a CPE DTE device, it does not really matter. It will auto-detect the LMI used by the switch it is connected to so there is no need to explicitly configure it.

Hope that helps - pls rate the post if it does.

Regards,

Paresh.

[mheusinger]

The difference is in number of DLCIs supported and in Cisco specific features.

With Cisco LMI you have support for ForeSight, which is a congestion management technology pattented to Cisco. It is much better than FECN/BECN. In conjunction with Cisco WAN switches you will get better end to end performance.

Hope this helps. Please rate all posts.

Regards, Martin