2610, STP and Aggregation switch

[Alessandro_78]

Hi all,
I've got a 2610 switch.
I need to connect the gigabit ports to two aggregation switch (for redundancy).
Actually I haven't that switches.

I'm looking at pair 2810 or 2824 but I don't know if I can aggregate (LACP or something similar) the two ports on 2610 to the two 2810 switches having a 2gbps aggregated bandwidth and redundancy.

Actually my network topology is like this:

2 42U rack with 20 servers inside each one.
1 2610 (24 ports) for each rack.

I need to connect the 2610 of each rack to the two aggregation switches.


CARRIER1 CARRIER2
| |
+----+ +----+
+2810+ +2810+
+----+ +----+
| |
\ /
+----+
+2610+
+----+
|

Is possible to aggregate the two ports?
Or i can only use one link?
RSTP will protect from loops.

[cenk sasmaztin]

hi
yes you can create two core 2800 whit one 2610 switch trunk and rstp config
two core switch you create one port trunk port and assing trunk number 1(trk1)

and adge switch to create 2 gigabit port configure for trunk (trk1 group) after attach all trunk group and enable stp
after create this config edge switch 2Gbps connect to core and full redundancy

good luck..

for example

Running configuration:

; J4900B Configuration Editor; Created on release #H.10.38

xxxfrist core switchxxx
hostname "ProCurve Switch 2626"
interface 10
no lacp
exit
trunk 10 Trk1 Trunk
snmp-server community "public" Unrestricted
vlan 1
name "DEFAULT_VLAN"
untagged 1-9,11-26,Trk1
ip address dhcp-bootp
exit
spanning-tree Trk1 priority 4

ProCurve Switch 2626(config)#

xxxsecond core switchxxx
hostname "ProCurve Switch 2626"
interface 10
no lacp
exit
trunk 10 Trk1 Trunk
snmp-server community "public" Unrestricted
vlan 1
name "DEFAULT_VLAN"
untagged 1-9,11-26,Trk1
ip address dhcp-bootp
exit
spanning-tree Trk1 priority 4

ProCurve Switch 2626(config)#


xxx edge switch configxxx
Running configuration:

; J4900B Configuration Editor; Created on release #H.10.38

hostname "ProCurve Switch 2626"
interface 10-11
no lacp
exit
trunk 10-11 Trk1 Trunk
snmp-server community "public" Unrestricted
vlan 1
name "DEFAULT_VLAN"
untagged 1-9,12-26,Trk1
ip address dhcp-bootp
exit
spanning-tree Trk1 priority 4

ProCurve Switch 2626(config)#

[Alessandro_78]

Doing so I connect one 2626 to one 2810 with a trunk. Link are redundant, but core (2810) aren't.

I need to connect port 23 on 2610 to port 1 on 2810, and port 24 on 2610 to port 1 on the second 2810.

RSTP over all.

Doing so I'll have redundant link and redundant 2810, but active will be only one link per time and max bandwidth will be 1gbit.

I would like to have 2gbit of aggregated bandwidth making an LACP trunk on port 23 and 24.

Is possibile to aggregate port 23 and 24 that are connected to two differente switch?

In cisco I can do so by staking switches.

[cenk sasmaztin]

hi
you say
Is possibile to aggregate port 23 and 24 that are connected to two differente switch?

YESS please you carefully above my config
my egge switch connect two different core switch on port 19-20 and successfully different two switch trunk connection under stp application and not blocking stp port any device

[Matt Hobbs]

You need support for split-trunking which ProCurve switches do not support.

The best you can do is use MSTP to load-balance different VLANs on your different upliinks.

[Alessandro_78]

cenk sasmaztin said that he did it using simple trunking (no lacp but trunk with no protocol)

[Richard Brodie_1]

I can't see cenk's hack working. If you can manage to fool spanning tree into keeping all 3 links active simultaneously, you've just made a loop.

[Alessandro_78]

So it isn't possibile to trunk ports 23 and 24 on 2610 to port 1 of one 2810 and port 1 of another 2810?

That's very bad....

[Richard Brodie_1]

On reflection, maybe it would work better than I suggested in my last post. I still don't think it's a great idea though.

Matt is the guru round here, so I would definitely take his advice seriously. If you could split the carriers onto 2 different VLANs, you could have both the 2610 links active, on different VLANs.

[Matt Hobbs]

Thanks Richard.

Looking at the original post again, there doesn't appear to be a link between the 2810's so in theory we have a loop free topology, but what's happening on the carrier end? Where is the default gateway?

Just to re-iterate though, you currently cannot configure a link aggregated group (trunk) that goes from one switch to two different switches.