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New Member

2960 - use all 4 uplink ports?

Hi,  I have a bunch of 2960.  planning on daisy chaining them together and then patching into a 4507.  In earlier versions of hw/sw you could use either the fiber port or the copper port, but not both. in the config I see:

interface GigabitEthernet0/1
!
interface GigabitEthernet0/2
!
interface GigabitEthernet0/3
!
interface GigabitEthernet0/4

2 are copper and 2 are fiber.  Can I use all 4 ports?

 

  • LAN Switching and Routing
3 REPLIES
Silver

With the help of STP you can

With the help of STP you can do that. However, if you have like 4 links between switches, only 1 can be active.

You can opt for etherchannel.


Here are guidelines on creating etherchannel:

1. Port members should have the same
    A. Speed
    B. Duplex (for Copper)
 
2. For different media type
    -EX: Copper/Fiber
    ->>Both can belong to a etherchannel group
    BUT, must have THE SAME SPEED

New Member

what I would like to do is

what I would like to do is daisy chain 3 switches together and then use one of the fiber ports to patch back into the distribution switch 4507.

So if we assume ports 1 and 2 are the copper gig uplinks

switcha port1 to switchb p1

switchb p2 to switchc p1

switchc p2 to switcha p2

create a daisy chain (above) and then connect one of the fiber uplinks (say switcha port3) to the 4507

Can do?

Thanks in advance.

 

Silver

Hey Wal,That is no problem

Hey Wal,

That is no problem really, by default STP is pre-configured so you dont have to worry about loops
also for faster convergence enable RSTP

in CS(Core)
spanning-tree mode rapid-pvst

spanning-tree vlan 1-10 priority 0    -makes CS as root switch

NOTE: add all your vlans(including the native vlan of your switch default is 1

syntax can be: 1-10,11,15-20 

 

all the rest:

spanning tree mode rapid-pvst

spanning-tree vlan 1-10 priority <value>    -value in increments of 4096

 

Ports:
interface <port>
switchport mode trunk   -or access whatever is your setup

Actually, you have the option to just leave the priority value by default on your access/daisy chained switches, just enable RSTP and you dont need to worry as well since RSTP is backwards compatible with STP, just in case you forget to configure RSTP :D

Just remember to always make your core as the root

If you want to know more about the details on 802.1d (STP) and 802.1w (RSTP) check out this video https://www.youtube.com/watch?v=cGn6jgn9aTk

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