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lamo

Gigabit ethernet optical/electrical config difference

7 posts in this topic

Hi experts, I would like to appologize for so lame question posted here, but still...

 

Could you advise if it is possible to differentiate GigabitEthernet port optical from electrical on 7609 Cisco router. I mean If I have only startup-config, what is the difference in configuration (if any) between optical and electrical GigabitEthernet ports.

 

Thank you in avance and once again sorry

 

Lame

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You mean if you are using say an Optical interface versus a physical Ethernet Interface...?

 

Hmm...

 

The difference between the OSM - optical interfaces and the copper Ethernet interfaces have to do with:

 

1. The physical layer

 

2. Some of the features that one might have versus the other.

 

Now with that said...

 

This is the config on the OSM:

 

interface GE-WAN9/1

bandwidth 50000

ip address x.x.x.9 255.255.255.252

ip pim sparse-mode

no negotiation auto

mls qos trust dscp

service-policy output AJA

 

This is another OSM interface with a subinterface configured:

 

interface GE-WAN9/4.111

description Metro E

bandwidth 50000

encapsulation dot1Q 111

ip address x.x.x.x 255.255.255.0

ip pim sparse-mode

mls qos trust dscp

service-policy output AKA

 

This is a copper Ethernet interface:

 

interface GigabitEthernet1/1

description ** Link to 3845 G0/1 **

ip address x.x.x.x 255.255.255.252

ip pim sparse-mode

speed 1000

duplex full

mls qos trust dscp

end

 

 

 

All of these are on a Catatlyst 6500 Series Switch.

 

Not much difference config-wise.

 

Darby

 

http://www.darbyslogs.blogspot.com

Edited by Darby Weaver
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Thank you very much for your reply ...

just to confirm... if I see lets say GigabitEthernet 1/1 then I am safe to say that this is electrical (just a copper wire). And the difference between is only naming conventions. Is it correct ?

Or GigabitEthernet 1/1 also can be optical ???

 

Best regards

 

Lame

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I mean to say that in case of not WAN interfaces but simple board with 1 G SFP tranceivers we also will get naming convention like GigabitEthernet 1/1 and not GE-WAN9/x. Please crrect me if I am wrong. Probably I just cannot explain myself well. So just summary of the question is that:

 

Can GigabitEthernet 1/1 be an optical interface or it is definitely copper ?

 

Thank you in avance for prompt response and

 

Best regards

 

Lame

Edited by lamo
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In my case:

 

1. GE-WAN9/x is an optical interface. It is optical.

 

2. GigabitEthernet1/1 is copper as is WS-X6748-GE-TX it could easily be a WS-6516 with Fiber 5458 GBICs or even the WS-X6724 with Gigabit SFPs...

 

The config is essentially the same.

 

There is a difference!!!!!!!!!!!!

 

In the OSM Blade (Only 4 ports in my case per chassis) it also supports QoS functions as a router not as a switch. That is a HUGE difference. Have you ever used a Flex-WAN module in a 6500 chassis before - basically a module that takes PA-XXX modules from a 7200/7500 series router.

 

The OSM (optical) ports work, taste, and feel like a router - the best place to demonstrate this is with QoS.

 

 

Hope that helps.

 

Otherwise most of the config is not really that different at all.

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Any time!

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