I have one Frame Relay link which I need to turn up. Currently my Serial1/0 is up/up but my sub-interface 1/0.1 is down/down, although I am receiving LMI on my interface. Does receiving LMI mean that I have layer 1 & 2 connectivity between my router and telco's FR switch? Let me know my assumption is wrong/right.
receiving FR LMI messages means connectivity between your router and the FR switch of the provider.
To get further information you can debug the LMI messages (debug frame-relay lmi). You might have to wait for a minute or so, but finally you should see a message regarding the configured DLCI. It should look similar to
: Serial1(in): Status, myseq 3
: RT IE 1, length 1, type 0
: KA IE 3, length 2, yourseq 4 , myseq 3
: PVC IE 0x7 , length 0x3 , dlci 100, status 0x0
The information to check:
1) which DLCI number is reported? Does it match your configuration?
2) what is the status? If the DLCI is active it should show 0x2
Any other status should be reported to the service provider for further trouble shooting inside the SP network.
Possible status states are
0x0-Added/inactive means that the switch has this DLCI programmed but for some reason (such as the other end of this PVC is down), it is not usable.
0x2-Added/active means the Frame Relay switch has the DLCI and everything is operational. You can start sending it traffic with this DLCI in the header.
0x3-0x3 is a combination of an active status (0x2) and the RNR (or r-bit) that is set (0x1). This means that the switch - or a particular queue on the switch - for this PVC is backed up, and you stop transmitting in case frames are spilled.
0x4-Deleted means that the Frame Relay switch doesn't have this DLCI programmed for the router. But it was programmed at some point in the past. This could also be caused by the DLCIs being reversed on the router, or by the PVC being deleted by the telco in the Frame Relay cloud. Configuring a DLCI (that the switch doesn't have) will show up as a 0x4.
For details on how to troubleshoot frame relay please also have a look at "Comprehensive Guide to Configuring and Troubleshooting Frame Relay"
We are pleased to announce availability of Beta software for 16.6.3.
16.6.3 will be the second rebuild on the 16.6 release train targeted
towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are
looking for early feedback from customers befor...
Introduction Featured Speakers Luis Espejel is the Telecommunications
Manager of IENova, an Oil & Gas company. Currently he works with Cisco
IOS® and Cisco IOS XE platforms, and NX to some extent. He has also
worked as a Senior Engineer with the Routing P...
In this session you can learn more about Layer 3 multicast and the best
practices to identify possible threats and take security measures. It
provides an overview of basic multicast, the best security practices for
use of this technology, and recommendati...