Re: Trunk from 6248 Fabric Interconnect to Cisco 3750

salleek · ‎09-18-2012

Hi all, have been trying to get this to work and I'm running into a wall. This is a UCSB 5108 with 2 x 6248 FI's and 2 x 2208 FEX. Very basic:

6248UP ----- 3750G

3750 port config:

c3750G-DMZ#sh run int g1/0/11

Building configuration...

Current configuration : 130 bytes

!

interface GigabitEthernet1/0/11

switchport trunk encapsulation dot1q

switchport mode trunk

spanning-tree portfast trunk

end

6248 port config (configured from UCS Manager):

!Command: show running-config interface Ethernet1/12

!Time: Tue Sep 18 18:33:40 2012

version 5.0(3)N2(2.03a)

interface Ethernet1/12

description U: Uplink

pinning border

switchport mode trunk

switchport trunk allowed vlan 1-3,5,30-33,35,40-41,97-98,100-103,375-376,997,1000-1001

speed 1000

no shutdown

Weird thing is, the 3750 side shows up/up and the 6248 side shows:

6248-01-A(nxos)# show int eth 1/12

Ethernet1/12 is down (Link not connected)

Hardware: 1000/10000 Ethernet, address: 547f.eea7.29b3 (bia 547f.eea7.29b3)

Description: U: Uplink

MTU 1500 bytes, BW 1000000 Kbit, DLY 10 usec,

reliability 255/255, txload 1/255, rxload 1/255

Encapsulation ARPA

Port mode is trunk

auto-duplex, 1000 Mb/s, media type is 10G

I have checked:

License = good
Port speed configured
Tried a different SFP and cable.
1. nxos recognizes the transceiver
Moved ports on both switches
Every combination of shut / not shut you can think of...

Not really sure where to go next. Any suggestions?

Robert Burns · ‎09-18-2012

Can you get CDP info from each device:

3750 - show cdp neigh

UCS - connect nxos

- show cdp neigh

Paste the output here.

Also provide the exact tranceiver type used in each port.

UCS - connect nxos

- show int eth1/12 trans det

Thanks,

Robert

salleek · ‎09-18-2012

Thanks for response. I didn't mention before, trying to implement L2 disjointed network for this

6248-01-A(nxos)# show int eth1/12 trans det

Ethernet1/12

transceiver is present

type is 1000base-T

name is OEM

part number is SFP-T

revision is 11.0

serial number is ATS12060073

nominal bitrate is 1300 MBit/sec

Link length supported for copper is 100 m

cisco id is --

cisco extended id number is 4

Transceiver calibration is invalid >>>> I looked this up, looked like a cosmetic bug

6248-01-A(nxos)# show cdp nei

Capability Codes: R - Router, T - Trans-Bridge, B - Source-Route-Bridge

S - Switch, H - Host, I - IGMP, r - Repeater,

V - VoIP-Phone, D - Remotely-Managed-Device,

s - Supports-STP-Dispute

Device ID Local Intrfce Hldtme Capability Platform Port ID

c6506e-JC Eth1/17 141 R S I WS-C6506-E Ten1/4

0050568 Eth1/1/7 157 H -VM-SPID eth0

c3750G-DMZ#show int g1/0/11 transceiver properties

Diagnostic Monitoring is not implemented.

Name : Gi1/0/11

Administrative Speed: auto

Administrative Duplex: auto

Administrative Auto-MDIX: on

Administrative Power Inline: N/A

Operational Speed: 1000

Operational Duplex: full

Operational Auto-MDIX: on

Media Type: 10/100/1000BaseTX

c3750G-DMZ#show cdp nei

Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge

S - Switch, H - Host, I - IGMP, r - Repeater, P - Phone

Device ID Local Intrfce Holdtme Capability Platform Port ID

c3750G-DMZ#

todd.martin · ‎09-18-2012

looks like you have A 10G SFP in a port configured for 1000M