Switching

Unanswered Question
May 2nd, 2008
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in interface gigabitethernet1/0/4 what does the 1/0/4 represends...i know that 4 is the interface and 0 is slot but what is that 1 represends...Plz help


Regards

Ahmed Bava

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Ahmed,


This numbering scheme is primarly used for switches that can be stacked together. You can stack to physical switches together to make logical switches. Example:-


If you have 1 x 48 port switch, you see ports 1 to 48 as:-


1/0/1 - 1/0/48


If you add another 48 port switch - as it's the second of the stack you would see ports 1 to 96 as:-


Switch 1 - stack member 1

1/0/1 - 1/0/48


Switch 2 - stack member 2

2/0/1 - 2/0/48


You still have 2 physical switches, and 96 switch ports, but logicall in the config you see 1 switch and 2 x 48 ports. If you added a third switch:-


Switch 3 - stack member 3

3/0/1 - 3/0/48


all the way up to 9 switches in a stack.



HTH.

bava_ccna Mon, 05/05/2008 - 21:47
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Thanks....but i have one more doubt...we have Cisco catalyst 3750 switch without any stack...but still when i use sh run it is showing fa1/0/1 to fa1/0/24.whay it is showing like this? is there any specfic reason for this

Thanks

Ahmed Bava

mahmoodmkl Mon, 05/05/2008 - 22:30
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Hi


I think by default u r switch will be the member switch with member number 1.So due to this it might have this interface indentification scheme.


Thanks

Mahmood


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