CDP between SG300-24 and WS-X2948 WS-X2948G-GE-TX

Hello everybody,
I connected a SMB SG300 series switch to an 2948G (CatOS). On the first view CDP seemed not to work at all between the two. After configuring both switches to CDP version 1, the SG300 recognizes the 2948G in "sh cdp neigh", but not vice versa:
on 2948G:
core-switch> (enable) sh cdp
CDP : enabled
Message Interval : 60
Hold Time : 180
Version : V1
Device Id Format : Other
core-switch> (enable) sh cdp neighbors
No entry found.
on SG300:
wg-sw-3og#show cdp
Global CDP information:
CDP is globally enabled
CDP log duplex mismatch is globally enabled
CDP log voice VLAN mismatch is globally enabled
CDP log native VLAN mismatch is globally enabled
Mandatory TLVs validation is disabled
Sending CDPv2 advertisements is disabled
Sending Appliance TLV is enabled
Device ID format is Host Name
Sending CDP packets every 60 seconds
Sending a holdtime value of 180 seconds
CDP packets handling mode is bridging
wg-sw-3og#show cdp neighbors
Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge
S - Switch, H - Host, I - IGMP, r - Repeater, P - VoIP Phone
M - Remotely-Managed Device, C - CAST Phone Port,
W - Two-Port MAC Relay
Device ID Local Adv Time To Capability Platform Port ID
Interface Ver. Live
JAE0919BUZU(core-s gi28 1 146 T S WS-C2948G-GE 2/48
witch)
I checked a similiar setup of an SG300 against an Catalyst3550 in the lab. this worked flawlessly.
Any suggestions?
thx, Carsten

Yuriy,
In addition to these commands, you should review the MPLS Label (Outer Label) assigned by the MPLS network to the Xconnect to determine if it is using LDP or if is using a TE-Tunnel, MLS CEF (on the 7600) and the output of debug commands for the xconnect.
Note: Depending on the amount of Xconnects in your network, it's recommended to perform conditional debugging to limit the amount of debug data (i.e. debug interface Te4/4, followed by specific debug commands).
On the 7600:
- show mpls forwarding table | i 16002
- show mls cef mpls labels 16002
- show mls cef adjacency entry 16002 detail
- debug interface Te4/4
- debug mpls l2transport vc status event
- debug mpls l2transport vc status fm
Additional details available at :
http://www.cisco.com/en/US/docs/routers/7600/install_config/ES40_config_guide/es40_chap6.html
http://www.cisco.com/en/US/docs/routers/asr9000/software/asr9k_r4.0/troubleshooting/guide/tr40l2v.html
Let us know if you'd prefer to continue troubleshooting with you.

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