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Cisco 3750 and nortel 5520

bmic
bmic asked
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Need help as soon as possible. I need to configure a brand new nortel 5520 switch to work with a cisco 3750 switch. below is the the configure that is currently in use on the ports of the cisco 3750. I need help configuring the ports 45-48 on the nortel 5520. I'm using fiber to connect the two swiches. The cisco 3750 is currently connect to old 2900 series cisco swithches. We are upgrading the 2900 so i thought i would try a nortel switch. Any help would be greatly appreciated. Thanks

interface GigabitEthernet1/0/1
 description NON-Trunk Layer 3 link to Area 1
 no switchport
 ip address 10.2.1.1 255.255.248.0
 ip pim sparse-dense-mode
 duplex full
!        
interface GigabitEthernet1/0/2
 description NON-Trunk Layer 3 link to Area 2
 no switchport
 ip address 10.2.8.1 255.255.248.0
 ip helper-address 10.2.1.94
 ip helper-address 10.2.1.110
 ip pim sparse-dense-mode
 duplex full
!        
interface GigabitEthernet1/0/3
 description NON-Trunk Layer 3 link to Area 3
 no switchport
 ip address 10.2.16.1 255.255.248.0
 ip helper-address 10.2.1.94
 ip helper-address 10.2.1.110
 ip pim sparse-dense-mode
 duplex full
!        
interface GigabitEthernet1/0/4
 description NON-Trunk Layer 3 link to Area 4
 no switchport
 ip address 10.2.24.1 255.255.248.0
 ip helper-address 10.2.1.94
 ip helper-address 10.2.1.110
 ip pim sparse-dense-mode
 duplex full

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Commented:
Hi,

I miss something, do you have 4 fibers between the two switches ?
Then you should have four VLANs in your Nortel switch ?

If yes, as it's none-tagged links, you simply have to assign the various ports to corresponding VLANs, let's say VLAN 10, 20, 30, 40 for your various areas.
(I would suggest no to use VLAN 1 to avoid default VLAN behaviour, that's why I start at 10)

Assign an ip to your switch, let's say in VLAN 10, with IP 10.2.1.10/255.255.248.0

Command line with console connection:
> enable
# config terminal
(config) # cli password read-only ***READ_ONLY_PWD***
(config) # cli password read-write ***READ_WRITE_PWD***
(config) # cli password serial local
(config) # cli password telnet local


(config) # vlan configcontrol autopvid
(config) # vlan members remove 1 ALL
(config) # vlan create 10 name "Area 1" type port
(config) # vlan members add 10 1-11,45
(config) # vlan create 20 name "Area 2" type port
(config) # vlan members add 20 12-22,46
(config) # vlan create 30 name "Area 3" type port
(config) # vlan members add 30 23-33,47
(config) # vlan create 40 name "Area 4" type port
(config) # vlan members add 40 34-44,48

(config) # vlan mgmt 10
(config) # ip address switch 10.2.1.10 netmask 255.255.248.0 default-gateway 10.2.1.1

Should be ok for basic operations ...

Author

Commented:
no i don't and we don't have vlan in the network except vlan 1.
GB 1/0/1 links the 2900 switches that i am replacing with the nortel switch to the cisco 3750
so that really is the only port i need to cofig to work with the configuration above.

the config for the 2900 is currenty listed below

interface FastEthernet1/2
 description "Uplink to cisco 3750
 switchport trunk encapsulation dot1q
 switchport mode trunk

interface GigabitEthernet1/0/1
 description NON-Trunk Layer 3 link to Area 1
 no switchport
 ip address 10.2.1.1 255.255.248.0
 ip pim sparse-dense-mode
 duplex full

the other links on the 3750 are ok as they go to different subnets across the campus
along with the other links on the 2900 they also go to diferent area. so its just the fa 1/1 config that i need to duplicate on the nortel switch so it will talk to the cisco 3750 which is the GB1/0/1 config

Commented:
Ok, so you simply just have nothing to do: the default port configuration fits your need, none-trunked and all the ports in VLAN 1.
Just add an ip address on your switch and password as listed above, and forget all the lines about vlan.

Concerning the configuration you wrote, something must be wrong.
How a "trunked FastEthernet on the 2900" can connect to a "non-trunk GigabitEthernet on 3750" ...

If we follow the 3750 configuration, everything is gonna be ok.

Author

Commented:
Nothing but defaults and still no link between port 45 on nortel and gb 1/0/1 on Cisco we have to be missing something

Author

Commented:
Nothing but defaults and still no link between port 45 on nortel and gb 1/0/1 on Cisco we have to be missing something

Commented:
By link, you mean physical link (lights on the port), or Layer 2 connection ?

If there's no lights, it's not a config problem, but a physical one:
* Have you tried to cross the fiber
* Is the GBIC correct: SX / LX
* On the 3750, what does "show interfaces gigabitethernet1/0/1" says ?

Author

Commented:
There are no lights can' croos fibre on the gbic that I know of
The gbic are correct as far as I can't tell they ar a different in style because of the different in switches
Athe port on the 3750 is work because if I plug in the 2900 it comes right up.

Commented:
I didn't understand if you succeed to cross the fiber, but you have too try.
Currently, the TX on the 3750 is maybe linked to the TX on the Nortel, instead of the RX.
It definitely can't works if it's the case.

Author

Commented:
Got a link on the 3750 but no link on the nortel that is weird . I had to turn off the auto negotiate for the link speed and the it connect a 10 mb which I don't understand. So it's not the fiber it has to be a config issue

Commented:
So on each side, turn off the speed autonegotiation and duplex auto-negotiation.

On Nortel try:

(config)t#interface fastethernet 45
(config-if)#speed 1000
(config-if)#duplex full

Author

Commented:
Still not light on the nortel side very slow blinking light on Cisco side

Commented:
Have you set 1000/full on cisco side too ?

print "show interfaces gigabitethernet1/0/1"

Author

Commented:
Duplex is ful don't see a setting for speed on Cisco side

Author

Commented:
Got run get a crossover cable be right back

Author

Commented:
i think i figured out what the problem is. In the Cisco switch i have 100baseFX SFP and in the Nortel i have a SX gbic type. From what i read the two will not work together. So i guess i need to get some 100baseFX SFP's for the Nortel. Is this correct?
Commented:
You won't be able to change the speed of a gigabit interface on Nortel, which means it can't operate at a lower speed like 100Mbits/s.
It's not a GBIC issue, it comes from the interface.

So you have to use a gigabit interface on your Cisco.

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