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Author Topic: Switch added to a stack  (Read 3528 times)

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Offline gcloutier

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Switch added to a stack
« on: May 22, 2014, 04:26:52 PM »
We added a switch to our stack and forgot to remove the IP address. I would like to know if I can blank the IP by connecting directly to the switch and run the command: (config)#ip address switch 0.0.0.0

Will this affect my stack at all?

I'm running my stack of 5 4550T-PWR and 1 4548GT-PWR with software 5.7

Thanks in advance.


Offline TankII

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Re: Switch added to a stack
« Reply #1 on: May 22, 2014, 06:23:28 PM »
no ip address switch
ip address stack X.X.X.X (whatever the switch’s IP is)
cli password stack serial local
cli password stack telnet radius

Offline gcloutier

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Re: Switch added to a stack
« Reply #2 on: May 23, 2014, 08:54:32 AM »
no ip address switch
ip address stack X.X.X.X (whatever the switch’s IP is)
cli password stack serial local
cli password stack telnet radius


Could you be just a tad more detailed on what you're asking me?

Thanks,

Offline TankII

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Re: Switch added to a stack
« Reply #3 on: May 23, 2014, 09:03:12 AM »
That's the command sequence you can run to fix your issue.
Removes the switch IP, and converts it to stack.
If you are running any passwords on your logins, the rest fix the login issues.

TankII

Offline gcloutier

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Re: Switch added to a stack
« Reply #4 on: May 23, 2014, 09:12:09 AM »
That's the command sequence you can run to fix your issue.
Removes the switch IP, and converts it to stack.
If you are running any passwords on your logins, the rest fix the login issues.

TankII
Here's the show ip result. For what I understand I just need to run the "no ip address switch" The command fcor the stack address is already in there.

BTW I can already modify it through the stack management so I don't think that I need to reset any password.

                            Configured        In Use        Last BootP/DHCP
                           --------------- --------------- --------------------
Stack IP Address:          192.168.1.5     192.168.1.5     0.0.0.0
Switch IP Address:         137.135.128.139                 0.0.0.0
Stack Subnet Mask:         255.255.255.0   255.255.255.0   0.0.0.0
Default Gateway:           192.168.1.12                    0.0.0.0

Offline gcloutier

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Re: Switch added to a stack
« Reply #5 on: May 23, 2014, 09:36:57 AM »
Just try the "no ip address switch" and got this message: "This may disable IPV4 network connectivity, are you sure (Y/n)"

Not really reassuring since I'm on prod system.  :-\

Offline TankII

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Re: Switch added to a stack
« Reply #6 on: May 23, 2014, 12:54:13 PM »
Remember, the switch will always forward traffic in L-2 mode.  So, if you are consoled into the unit, you can do all sorts of fun things like change management VLANS and stuff without impacting users.
So, by going no ip address switch, you are removing the switch IP (converting it to 0.0.0.0).
Then, you input the new Stack IP (usually the same as the switch IP) with the mask and gateway unchanged, you are up and running exactly the same.
Users are not impacted, even in production.  However, you need to be consoled into the unit when you do this.
We use this method when adding ports on older code.  If we have a single switch, we can use these steps to remove the switch IP, add the new unit to it and make it a stack, then move the IP to the stack.  We do this in production periodically, less so since we standardized on ERS5698's.

TankII

Offline Johan Witters

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Re: Switch added to a stack
« Reply #7 on: May 25, 2014, 04:32:16 PM »
Just try the "no ip address switch" and got this message: "This may disable IPV4 network connectivity, are you sure (Y/n)"

Not really reassuring since I'm on prod system.  :-\

That is a standard message the switch always displays when you remove an ip address. In case of a stack you can remove the switch ip addresses without any issue: the stack works with the stack ip address exclusively, the switch addresses are only kept in case a switch is taken out of the stack.

so just run the "no ip address switch" command ...


johan
Kind regards,

Johan Witters

Network Engineer
BKM NV