Help understanding IRF "stack" through-put

[Jaan]

Hi guys and girls,

 

I'll try to explain this the best i can, but i've also drawn a little pic for you all (yay Art).

 

I have a core stack that consists of four HP A5500 EI switches that have dedicated stack ports/cables on the rear of the unit.

 

Each of these four switches has a aggregated port which connects to an edge switch.

 

My edge switches are HP1910-48g and do not have dedicated stack ports.

 

They have a feature called IRF that allows me to define which ports i want to use in a stack.

 

I'm having problems finding info of what data though-put a IRF port is capable of between the stack.

 

Looking at my pic below (dont laugh took me ages!). the switches on the left are my edge switches.... the switch on the right is my core stack.

 

If the edges switch are connect via a single irf cable (this is just a standard cat6 cable where the port has been configguired as a irf port) Am i right in thinking that the "Master" switch has a data through-put to the core of approx 4GBits, but the slave only 1Gbits because of the cable bottle neck?

 

i can add another 3 IRF ports to make a 4gbit link, but just wanted to know if a port is set as a IRF port its through-put is equl to the switches internal swich speed or capped @ 1Gbit.

 

I'm alittle confused.

 

[CyberNerd]

I don't think you should mix different switch types in a stack.

I would keep the 5500's in a stack and just use redundant dynamic lacp links to the edge.

[Jaan]

I have 1 stack of 2x hp 1910s (edge switches) and 1 stack of 4 x HP A5500 EI (Core Switches)

 

and want to link my edges to to core via link aggregation. I under the understanding that thats is what i have got. i thought i had two stacks of two different switches..... a core and edge... am i wrong??

 

I'm new to this is is my diagram wrong on how you would connect to core to the edge switches?

[CyberNerd]

I have 1 stack of 2x hp 1910s (edge switches) and 1 stack of 4 x HP A5500 EI (Core Switches)

 

Ok, got it - I thought you were trying to mix and match the stack.

 

and want to link my edges to to core via link aggregation. I under the understanding that thats is what i have got. i thought i had two stacks of two different switches..... a core and edge... am i wrong??

I'm new to this is is my diagram wrong on how you would connect to core to the edge switches?

 

no - this all sounds good.

 

I'd be inclined to plug the uplinks into both of the edge switches.

 

So all you need to do is create a (dynamic) aggregation group on the core, add the ports and then do the same on the edge.

 

on the core you would do something similar to:

 

 link-aggregation group X mode static						
link-aggregation group X description Link-edge-switches

interface GigabitEthernet1/0/n						
port link-type hybrid						
port hybrid vlan X Y  tagged						
port hybrid vlan Z untagged						
broadcast-suppression pps 3000						
description Link-To-edge						
lacp enable						
port link-aggregation group X						
apply qos-profile default		

interface GigabitEthernet2/0/n						
port link-type hybrid						
port hybrid vlan X Y  tagged						
port hybrid vlan Z untagged						
broadcast-suppression pps 3000						
description Link-To-edge						
lacp enable						
port link-aggregation group X						
apply qos-profile default

interface GigabitEthernet3/0/n						
port link-type hybrid						
port hybrid vlan X Y  tagged						
port hybrid vlan Z untagged						
broadcast-suppression pps 3000						
description Link-To-edge						
lacp enable						
port link-aggregation group X						
apply qos-profile default				

interface GigabitEthernet4/0/n						
port link-type hybrid						
port hybrid vlan X Y  tagged						
port hybrid vlan Z untagged						
broadcast-suppression pps 3000						
description Link-To-edge						
lacp enable						
port link-aggregation group X						
apply qos-profile default

 

I don't know about the 1910's - never had to use them.

[Jaan]

Sorry for the late reply and thx for your help so far......

 

each of the 4 core switches has port 1 set and a dynamic aggregation link with LACP already....

 

im under the impression (i'll need to check the manual again) that i can not create a link aggregation over two physical switch in a HP 1910 stack. it has to be on the master switch.

 

which is way i wanted to know if a IRF link on a hp 1910 is limited to 1gbit per port or does it use it own stacking protocol and if so what speed?

 

it just looks like a bottle neck to me..... but my brain is already mushed!

 

and again thx for your help.