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Connecting two procurve 2510g switches

Louis Ciavarella
Occasional Visitor

Connecting two procurve 2510g switches

We recently installed a 2510g 48 port and a 2510g 24 port switch and are not able to connect the switches using the dual personality ports. When connecting one of the dual personality ports on one switch to a dual personality port on the second switch (using the copper ports) the connection works. However, after connecting another cable so that two of the dual personality ports are connected to two of the same port on the second switch the entire switch goes down and all the lights on the ports remain on solid. Any ideas?
12 REPLIES
Franklyn
Frequent Advisor

Re: Connecting two procurve 2510g switches

Hi Louis, can you do the following, connect the two switches using both the dual personality ports and then run a showtech for both the switches, and attach them, I guess someone in here can make out what is going on.

Good Luck!

Louis Ciavarella
Occasional Visitor

Re: Connecting two procurve 2510g switches

Good idea except once the switches are connected I cannot access them. Perhaps I could connect to the console directly but I'm not sure how to save the log of the show tech command.
cenk sasmaztin
Honored Contributor

Re: Connecting two procurve 2510g switches

please send me
sh log -a command print
cenk

Louis Ciavarella
Occasional Visitor

Re: Connecting two procurve 2510g switches

Here is the log of the main switch.
Richard Brodie_1
Honored Contributor

Re: Connecting two procurve 2510g switches

"However, after connecting another cable so that two of the dual personality ports are connected to two of the same port on the second switch the entire switch goes down and all the lights on the ports remain on solid."

If I understand correctly, this is a "Doctor it hurts when I do this" kind of question. If you make a loop in your network you can get positive feedback, which is nearly always a bad thing, unless you are Jimi Hendrix.

If you want multiple connections between two switches, you can configure them as a trunk. Chapter 11 of the management guide describes setting up trunks.
cenk sasmaztin
Honored Contributor

Re: Connecting two procurve 2510g switches

hi Louis

fristly enable stp on each switch

for example

sw(config)# spanning-tree [enter]

after you make trunk config two uplink port

for example

sw1(config)# trunk 23-24 trk1 trunk

sw2(config)# trunk 23-24 trk1 trunk

23-24 interface number must be uplinks port

good luck
cenk

Pieter 't Hart
Honored Contributor

Re: Connecting two procurve 2510g switches

Stack Members
SN MAC Address System Name Device Type Status
-- ------------- ---------------- --------------------- ----------------------
0 001f28-591300 Commander-0 ProCurve 2510G-48 Commander Up
1 001f28-594100 Commander-1 ProCurve 2510G-48 Member Up
2 001f28-582e80 Commander-2 ProCurve 2510G-24 Member Up

Does this mean the switches are allready connected through a stack-cable?

Then you certainly don't want to them connected through any other network port!!!
Pieter 't Hart
Honored Contributor

Re: Connecting two procurve 2510g switches

sorry for my previous post
I found 2510 uses "virtual stack" through network ports.
Louis Ciavarella
Occasional Visitor

Re: Connecting two procurve 2510g switches

Well, I suppose I could go the route of setting up trunks on the switches, I just assumed that the dual personality ports served as a link to other switches, similar to the way gbics could be used to tie two switches together.
Pieter 't Hart
Honored Contributor

Re: Connecting two procurve 2510g switches

As from the "advanced trafic mangement guide", The dual personality port are no different then other network ports.
As seen in the image of my previous post, normal RJ45 ports, dual-peronality RJ45 ports. and dual personality modules are all useable to connect other switches.
Without GBIC or SFP module, the RJ45 connector is active. When a module is placed the corresponding RJ-45 port is automatically disabled.

From that point of view, the switches should not go down when multiply connected and spanning-tree is active, they should only block one path.
When configured as port trunks (LACP) multiple links can be active.

The 2510 "stack" only means a central point of management.
This is not the same as a cisco 3750-stack. But more like cisco "cluster" switch wich also uses a single command-switch to control the others.
martinhk
Occasional Visitor

Re: Connecting two procurve 2510g switches

I also have a few questions re. the 2510 G stacking capabilities - I'm used to using Cisco 3750's so presumed that the "stack" feature on the 2510 G was similar. Obviously not.

Can two 2510 G switches be setup so as to appear as a virtual single switch? Can the ports on switch two be part of a static vlan on switch 1?

Thanks.
Pieter 't Hart
Honored Contributor

Re: Connecting two procurve 2510g switches

Martin,
i think you'd better start a new thread, with a refference to this one.

but for your questions:
- no, the 2510's don't form a stack as the cisco's do.
The cisco 3750's form a single switching backplane (fabric) using special "stack cables".
the 2510's from a stack only to be managed from a central point.
cisco 2950's also had the "switch management cluster" wich is more similar to this HP-stack.

- yes, vlan's can (are designed to) span multiple switches .
you need to configure connecting ports on both switches as "tagged" in all vlans that must cross to the other switch.
then on each switch you configure a port as "untagged" in a vlan for a connected device must connect through this vlan.