Cisco – Restoring MDS configurations from somewhere else

We recently had to replace a Cisco MDS 9124e in our lab. I used to use this method to copy and restore configuration files to MDS switches.

switch# copy tftp://192.168.0.20/switch.cfg startup-config
Trying to connect to tftp server......
Connection to server Established. Copying Started.....
|
TFTP get operation was successful
This command is deprecated. To obtain the same results, please use
the sequence 'write erase' + 'reload' + 'copy <file> running-config' + 'copy running-config startup-config'.

It was rough, but it used to work. So now I do this.

switch# copy tftp://192.168.0.20/switch.cfg bootflash:
Trying to connect to tftp server......
Connection to server Established. Copying Started.....
|
TFTP get operation was successful
switch# dir
      15155    Feb 05 21:37:37 2013  switch.cfg

write erase
reload
copy switch.cfg running-config
copy run start

It makes sense, as the write erase and reload commands make you think about what you’re doing, and you need to be sure that you want to overwrite the running or startup config.

Updated articles page

I’ve added another document to my articles page. This one covers the creation of port-channels between Cisco MDS 9513 switches. I was clueless about a lot of this until a friend from EMC took me through the steps. So I’ve created this document as a way to capture those steps for future reference. Hopefully you’ll find it of use.

Cisco MDS 9XXX Basics – Part 4

Creating port-channels between Core – Edge … I had this blog post in my drafts section for a week, and then Scott Lowe – bless his cotton socks – beat me to it with a typically well-written post on ostensibly the same topic. So I’ll point you to his post, because it gets the idea across in a coherent fashion. I’ll make an effort, however, to get some more interesting switch config articles about before the Christmas break.

Cisco MDS 9XXX Basics – Part 3

Once you’ve setup the basic config of your switches, it’s important to backup your configs somewhere not on the switch. There’s nothing worse than not having a backup of your current configs and having to start from scratch. Especially if you’ve just done 20+ zones the hard way. Not that I would know what that feels like.

The first thing to do is create a backup job that copies the running config to the startup config, and then copies the startup config to a tftp host.

conf t
scheduler enable
scheduler job name backup_config
copy running-config startup-config
copy startup-config tftp://tftphost/backup/insertswitchname_cfg_$(TIMESTAMP).txt
end

Once you’ve done that, check your handiwork to make sure you’ve not made any embarassing typos.

show scheduler job name backup_config

Now you probably want to schedule your backup job to run at some kind of frequency.

conf t
scheduler schedule name nightly_6pm
time daily 18:00
job name backup_config
end

Check your schedule is good with this command:

show scheduler schedule

Happy? Good, me too. Because I’ve already backed up my configs. And so should you.

copy running-config startup-config

Oh wait, I created a job but put some garbage in it and didn’t realise until I saved everything. No problem, Cisco likes to use no for when you want to get rid of things. So to delete the job you just created …

conf t
no scheduler job name backup_config
end

As I’ve said before, my knowledge of Cisco SAN-OS and NX-OS commands is rudimentary at best, but I found these ones useful.

Cisco MDS 9XXX Basics – Part 1

So we’ve finally started delivering on the project that I’ve been working on for the last 12 – 18 months. It’s fun to see my detailed designs turn into running infrastructure.

As part of this, I’ve been doing some configuration of some new Cisco 9513 and 9124e switches for our fabric. I have every intention of writing a downloadable article with some of the basic stuff, but I thought I’d do a few, smaller articles for my own reference more than anything else.

Now, most Cisco nerds will already know this stuff, but for someone like me who cut their teeth on Brocade Fabric OS, it’s a little different.

To connect to a 9124e (Cisco’s blade switch), I recommend using the HP OA’s serial connection.

Connect to the active OA via serial, login using your normal credentials and run

connect interconnect 3

This will connect you to the serial console of the first 9124e switch in the chassis. This assumes that you have other devices in bays 1 and 2, such as Cisco 3120s, or whatever.

If this is the first time you’ve connected to the switch, or if you’ve not configured it yet, you’ll get to a very useful first setup screen.

Press [Enter] to display the switch console:
  Enter the password for “admin”:
  Confirm the password for “admin”:

         —- Basic System Configuration Dialog —-

This setup utility will guide you through the basic configuration of
the system. Setup configures only enough connectivity for management
of the system.

Please register Cisco MDS 9000 Family devices promptly with your
supplier. Failure to register may affect response times for initial
service calls. MDS devices must be registered to receive entitled
support services.

Press Enter at anytime to skip a dialog. Use ctrl-c at anytime
to skip the remaining dialogs.

Would you like to enter the basic configuration dialog (yes/no): yes

 

  Create another login account (yes/no) [n]:

  Configure read-only SNMP community string (yes/no) [n]:

  Configure read-write SNMP community string (yes/no) [n]:

  Enter the switch name : FCswitch1

  Continue with Out-of-band (mgmt0) management configuration? (yes/no) [y]:

    Mgmt0 IPv4 address : 192.168.0.10

    Mgmt0 IPv4 netmask : 255.255.255.0

  Configure the default gateway? (yes/no) [y]:

    IPv4 address of the default gateway : 192.168.0.254

  Configure advanced IP options? (yes/no) [n]:

  Enable the ssh service? (yes/no) [y]:

    Type of ssh key you would like to generate (dsa/rsa) [rsa]:

    Number of rsa key bits <768-2048> [1024]:

  Enable the telnet service? (yes/no) [n]:

  Enable the http-server? (yes/no) [y]:

 Configure clock? (yes/no) [n]:

 Configure timezone? (yes/no) [n]:

 Configure summertime? (yes/no) [n]:

  Configure the ntp server? (yes/no) [n]:

  Configure default switchport interface state (shut/noshut) [shut]:

  Configure default switchport trunk mode (on/off/auto) [on]:

  Configure default switchport port mode F (yes/no) [n]:

  Configure default zone policy (permit/deny) [deny]:

  Enable full zoneset distribution? (yes/no) [n]:

  Configure default zone mode (basic/enhanced) [basic]:

The following configuration will be applied:
  password strength-check
  switchname FCswitch1
  interface mgmt0
    ip address 192.168.0.10 255.255.255.0
    no shutdown
  ip default-gateway 192.168.0.254
  ssh key rsa 1024 force
  feature ssh
  no feature telnet
  feature http-server
  system default switchport shutdown
  system default switchport trunk mode on
  no system default zone default-zone permit
  no system default zone distribute full
  no system default zone mode enhanced

Would you like to edit the configuration? (yes/no) [n]:

Use this configuration and save it? (yes/no) [y]:

At this point, the switch does a copy run start and reboots. For some reason we’ve been getting this error.

 Error: There was an error executing at least one of the commands
Please verify the following log for the command execution errors.
Disabling ssh: as its enabled right now:
 ssh: Cannot disable both telnet and SSH

I’ve been ignoring this error. So, too, has NX-OS. You’ll then see the following:

Would you like to save the running-config to startup-config? (yes/no) [n]: y

[########################################] 100%

The switch then reboots and you can monitor it for any errors. Once you’re satisfied with the config, use CTRL-SHIFT-_ and press d to disconnect from the 9124e terminal. The process is identical for the Cisco MDS 9513, except for the bit about it being a blade switch :)