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GbE2 uplink to Cisco 6500

Adam Bertram_1
Occasional Visitor

GbE2 uplink to Cisco 6500

Hello, I've currently got three shelves of BL20 G3's with two GbE2 interconnect switches per shelf.

We have a need for certain servers have specific interfaces sitting in different vlans. Ie. VLAN2 - Production, VLAN5-ISCSI, VLAN10-REPLICATION, etc.

My question is what is the proper configuration on the GbE2 and Cisco 6500 with regards to VLANs/Trunk configuration?

The way I read it is that if I have to have the GbE2 uplink port set with tagging enabled, create VLANs 2,5,10 per above and add the appropriate GbE2 ports that correspond to the Network adapter of the servers I need to have in that VLAN. Do I need to enabled tagging on these ports as well?

On the Cisco side of things, when you talk 802.1q tagging, we're talking trunk port. Do I have to configure the port the GbE2 uplink is plugged into as a trunk port as well?

If anyone can clarify or explain a similar configuration using the GbE2 uplinked to a cisco switch with multiple vlans, that would be great!
1 REPLY
Dan Ahlfeld
Occasional Contributor

Re: GbE2 uplink to Cisco 6500

I recently inherited several of these setups. Attached are the pertinent parts of the configuration.

"tag" in the Nortel world is the same as "trunk" in the Cisco world. Pick your port(s) and ensure "tag ena" is part of that port config.

/c/port 21
tag ena
pvid 22
/c/port 21/gig
fctl both
speed 1000
mode full
auto on
/c/port 22
tag ena
pvid 22
/c/port 22/gig
fctl both
speed 1000
mode full
auto on

For each VLAN, you want to ride this trunk, you need to add the trunk port(s) to this vlan declaration area.
{replace letters with your vlan numbers}

/c/vlan XX
ena
name "VLAN XX"
def 17 18 21 22
/c/vlan YY
ena
name "VLAN YY"
def 17 18 21 22
/c/vlan ZZ
ena
name "VLAN ZZ"
def 1 3 5 7 9 11 13 15 17 18 21 22
/c/vlan AA
ena
name "VLAN AA"
def 17 18 21 22
/c/vlan BB
ena
name "VLAN BBB"
def 17 18 21 22 23 24
/c/vlan CC
ena
name "VLAN CC"
def 2 4 6 8 10 12 14 16 19 20
/c/vlan DDD
ena
name "VLAN DDD"
def 17 18 21 22

If you desire to create an etherchannel you use the Nortel "trunk".

/c/trunk 2
ena
add 21
add 22

At the Cisco end

***This VLAN number needs to match the Nortel's "pvid" number.***
set vlan 22 11/25-32

***Self Explanatory***
set port speed 11/25-48 1000

***Apply VLANs to Cisco Ports; Replace Letters with your VLAN numbers; I have found â nonegotiateâ to be a requirement; You'll have to look at your Cisco switch's counters to confirm that both trunks are passing similar amounts of traffic; nonegetiate will force your Cisco Switch to show â trunkâ in the â show port statusâ screen, whether itâ s trunking or not***
clear trunk 11/25 1-1005,1025-4094
set trunk 11/25 nonegotiate dot1q AA-BB,CC,DD
clear trunk 11/26 1-1005,1025-4094
set trunk 11/26 nonegotiate dot1q AA-BB,CC,DD

***bpdu-guard can make troubleshooting a bear. Disable it***
set spantree bpdu-guard 11/25-30,11/35 disable

If you are channelling (Nortel "trunking")
set port channel 11/25-30 mode