Trunk capacity

Unanswered Question
Jun 1st, 2008

Was curious to know, how to determine the trunk capacity of a switch ? Is there any cisco recommendation for this.

I have this problem too.
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Amit Singh Sun, 06/01/2008 - 23:25

Trunk capacity??? It depends on the type of ports you have in terms of bandwidth capacity. It depends on switch model numbers in terms on supports vlans to be carrid over the trunk links. Like some of the switches support 4K vlans, some 1K vlans, some 256 vlans.. etc...


-amit singh

Sushil Kumar Katre Sun, 06/01/2008 - 23:35


If you want to know if the interface on the siwtch supports trunk and which encapsulation mode use -

show interface capabilities

Switch# show interfaces gigabitethernet0/2 capabilities


Model: WS-C3560-24PS

Type: 10/100/1000BaseTX

Speed: 10,100,1000,auto

Duplex: full,auto

Trunk encap. type: 802.1Q,ISL

Trunk mode: on,off,desirable,nonegotiate

Channel: yes

Broadcast suppression: percentage(0-100)

Flowcontrol: rx-(off,on,desired),tx-(none)

Fast Start: yes

QoS scheduling: rx-(not configurable on per port basis),tx-(4q2t)

CoS rewrite: yes

ToS rewrite: yes

UDLD: yes

Inline power: no

SPAN: source/destination

PortSecure: yes

Dot1x: yes

-> Sushil


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