01-05-2012 06:09 PM - edited 03-01-2019 10:13 AM
Hello,
Is dot1q supported on the 6248 Interconnects? We have a few 3750's and we have FC connected from the 3750's to the interconnects with the following configuration:
Int gx/x/x
Switchport mode trunk
Switchport trunk encap dot1q
Switchport trunk allowed vlan 100,105,110,120,130,140,150
No cdp enable
Int gx/x/x
Switchport mode trunk
Switchport trunk encap dot1q
Switchport trunk allowed vlan 100,105,110,120,130,140,150
No cdp enable
Is this type of connection supported? If so, can someone point me to some documentation.....
Thanks
01-05-2012 06:53 PM
HX,
NXOS only supports dot1q encapuslation, which it uses by default.
Two comments:
-Is there a reason you're disabling CDP? It's very useful for t-shooting and is supported on the UCS 6x00 interconnects.
-If you're using the default End Host Mode for switching, then you can also enable Portfast on the 3700 interfaces connecting to the interconnects, since there will be no STP running on them.
Regards,
Robert
01-05-2012 07:00 PM
SO this configuration will work?
I will talk to the networking guys about CDP?
Should I be in End Host Mode?
Thanks
01-05-2012 07:04 PM
Yes, your config "should" work, but I can't tell how the other side (UCS) has been configured. Ensure all necessary VLANs have been created with UCS as well.
EHM is the default operation mode, so unless you purposely switched it, that's what you using. The only reason to use switch mode (opposite of EHM) is if you're running version 1.4 or earlier and have disjoint layer 2 networks north of UCS. Otherwise stick with EHM all the way.
Regards,
Robert
01-06-2012 02:39 AM
Remember to configure your FI ports to 1 gig, any of the 6248 ports are 1 gig capable which is alot more flexable than the 6100's. Maybe time to invest in some N5K's so the UCS can really stretch its legs :-)
Regards
Colin
01-06-2012 08:07 AM
And the "Flow Control Policy", it's at default, is that ok?
Thanks
01-06-2012 08:08 AM
Yes. Most of the settings for UCS are optimized as defaults. So unless you have a specific reason to change them, defaults are your friend
Regards,
Robert
01-06-2012 08:20 AM
And we are using the SFP's that came with the UCS, 8G I do believe.
The port on the 3750 doesn't stay up and the light on the interconnect never goes green.........
01-06-2012 08:29 AM
HX,
There are no 8G ethernet tranceivers. Those are either 10G SFP+ or 8G FC tansceivers.
Please look at the transceiver and then compare it to the supported matrix
http://www.cisco.com/en/US/docs/unified_computing/ucs/hw/switch/install/overview.html
You can log into the UCSM CLI, "connect nxos" and do a "show int x/y tran detail" This will also get your the PID of the transceiver. Alternately you can click the port in UCSM GUI and it will tell you the Part ID.
As Colin pointed out, if you've connected a UCS Fabric Interconnect Interface (10G by default) to a 3750 (1G interfaces) you have to change the port speed to 1G. From UCSM, expand the FI-A/B -> Fixed Module -> Uplink Ethernet Ports and then click on the "Show Interface" link on the right side to adjust the port speed.
Regards,
Robert
01-06-2012 08:41 AM
Ok so maybe an SFP issue....
Ethernet1/31
transceiver is present
type is Unknown Type-(unknown)
name is CISCO-FINISAR
part number is FTLF8528P2BCV-CS
revision is D
serial number is FNS154703MG
nominal bitrate is 8500 MBit/sec
Link length supported for 50/125um fiber is 50 m
Link length supported for 50/125um fiber is 150 m
Link length supported for 62.5/125um fiber is 20 m
cisco id is --
cisco extended id number is 4
Ethernet1/32
transceiver is present
type is Unknown Type-(unknown)
name is FINISAR CORP.
part number is FTLF8524P2BNV
revision is A
serial number is U9K0XD6
nominal bitrate is 4200 MBit/sec
Link length supported for 50/125um fiber is 150 m
Link length supported for 62.5/125um fiber is 70 m
cisco id is --
cisco extended id number is 4
01-06-2012 08:57 AM
FTLF8528P2BCV is an 8GB Fiber Channel tranceiver
FTLF8524P2BNV is a 4GB Fiber Channel transceiver.
You can't uplink an ethernet port on the Fabric Interconnect with a Fibre Channel transceiver. Those are for the expansion module FC ports only.
The only supported optical ethernet transceivers are:
10GB
SFP-10G-SR
SFP-10G-LR
1GB
GLC-T
GLC-SX-MM
GLC-LH-SM
This is all referenced in the link I posted previously.
Robert
Note: To look up what type and speed a Cisco-Finisar transceiver is, go to
01-06-2012 09:42 AM
So this would work for example:
Ethernet1/29
transceiver is present
type is 1000base-SX
name is CISCO-FINISAR
part number is FTRJ8519P1BNL-C5
revision is
serial number is FNS0940Q0X5
nominal bitrate is 1300 MBit/sec
Link length supported for 50/125um fiber is 550 m
Link length supported for 62.5/125um fiber is 270 m
cisco id is --
cisco extended id number is 4
01-06-2012 10:48 AM
Nope...still an FC transceiver. A simple google search for "FTRJ8519P1BNL" reveals this...
1000base-SX
is not
a) GLC-T
or
b) GLC-SX-MM
or
c) GLC-LH-SM
Robert
05-23-2012 12:48 PM
I want to connect a 6248 FI to a 6500 using WS-X6716-10GE, what SFP should I use? any help is appreciated.
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide