Difference between revisions of "Cisco Switches"

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Generally it is better to use Cisco switches as the interface is familier, works better than the web-driven rivals, they are more reliable and familiarity is worth money, unlike any other switch or router (with the exception of Juniper).
Generally it is better to use Cisco switches as the interface is familier, works better than the web-driven rivals, they are more reliable and familiarity is worth money, unlike any other switch or router (with the exception of Juniper).
=== Goals ===
Broadly, create the VLAN, add and IP address to VLANs where needed, and move ports into the vlan.
== Fix idle timeout ==
Looking at <i>sh line vty 0</i> around other details I can see the idle timeout is only ten minutes. I like to change it to thirty minutes to give me more thinking time and to make the notes on this page without it logging me out.
<nowiki>switch>sh line vty 0 
  Tty Typ    Tx/Rx    A Modem  Roty AccO AccI  Uses  Noise  Overruns  Int
*    1 VTY              -    -      -    -    -      8      0    0/0      -
Line 1, Location: "", Type: "xterm-256color"
Length: 24 lines, Width: 80 columns
Baud rate (TX/RX) is 9600/9600
Status: PSI Enabled, Ready, Active, No Exit Banner, Ctrl-c Enabled
  Automore On, Notify Process
Capabilities: none
Modem state: Ready
Special Chars: Escape  Hold  Stop  Start  Disconnect  Activation
                ^^x    none  -    -      none       
Timeouts:      Idle EXEC    Idle Session  Modem Answer  Session  Dispatch
              00:10:00        never                        none    not set</nowiki>
This is how I change it to thirty minutes
<nowiki>
switch>en
Password:
switch#conf t       
Enter configuration commands, one per line.  End with CNTL/Z.
switch(config)#line vty 0 15   
switch(config-line)#exec-timeout 30 0
switch(config-line)#exit
switch(config)#exit
switch#disa
switch></nowiki>
Now the timeout is thirty minutes.
<nowiki>
switch>sh line vty 0
  Tty Typ    Tx/Rx    A Modem  Roty AccO AccI  Uses  Noise  Overruns  Int
*    1 VTY              -    -      -    -    -      8      0    0/0      -
Line 1, Location: "", Type: "xterm-256color"
Length: 24 lines, Width: 80 columns
Baud rate (TX/RX) is 9600/9600
Status: PSI Enabled, Ready, Active, No Exit Banner, Ctrl-c Enabled
  Automore On, Notify Process
Capabilities: none
Modem state: Ready
Special Chars: Escape  Hold  Stop  Start  Disconnect  Activation
                ^^x    none  -    -      none       
Timeouts:      Idle EXEC    Idle Session  Modem Answer  Session  Dispatch
              00:30:00        never                        none    not set
</nowiki>
== Create VLANs ==
Looking at the vlan setup doesn't require enable but changing it does.
<nowiki>
switch>sh vlan
VLAN Name                            Status    Ports
---- -------------------------------- --------- -------------------------------
1    default                          active    Gi1/0/1, Gi1/0/2, Gi1/0/3
                                                Gi1/0/4, Gi1/0/5, Gi1/0/6
                                                Gi1/0/7, Gi1/0/8, Gi1/0/9
                                                Gi1/0/10, Gi1/0/11, Gi1/0/12
                                                Gi1/0/13, Gi1/0/14, Gi1/0/15
                                                Gi1/0/16, Gi1/0/17, Gi1/0/18
                                                Gi1/0/19, Gi1/0/20, Gi1/0/21
                                                Gi1/0/22, Gi1/0/23, Gi1/0/24
                                                Gi1/0/25, Gi1/0/26, Gi1/0/27
                                                Gi1/0/28, Gi1/0/29, Gi1/0/30
                                                Gi1/0/31, Gi1/0/32, Gi1/0/33
                                                Gi1/0/34, Gi1/0/35, Gi1/0/36
                                                Gi1/0/37, Gi1/0/38, Gi1/0/39
                                                Gi1/0/40, Gi1/0/41, Gi1/0/42
                                                Gi1/0/43, Gi1/0/44, Gi1/0/45
                                                Gi1/0/46, Gi1/0/47, Gi1/0/48
                                                Gi1/0/49, Gi1/0/50, Gi1/0/51
                                                Gi1/0/52 
1002 fddi-default                    act/unsup
1003 trcrf-default                    act/unsup
1004 fddinet-default                  act/unsup
1005 trbrf-default                    act/unsup
</nowiki>
At this point everything is in VLAN1, which is the default configuration. However our goal here is to put ports into a relevant VLAN and turn off VLAN1. First we need to create some VLANs. Go into enable mode and conf t.
<nowiki>
switch>en 
Password:
switch#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
switch(config)#vlan 2
switch(config-vlan)#name dmz
switch(config-vlan)#exit
switch(config)#exit
switch#</nowiki>

Revision as of 21:12, 27 April 2023

Generally it is better to use Cisco switches as the interface is familier, works better than the web-driven rivals, they are more reliable and familiarity is worth money, unlike any other switch or router (with the exception of Juniper).

Goals

Broadly, create the VLAN, add and IP address to VLANs where needed, and move ports into the vlan.

Fix idle timeout

Looking at sh line vty 0 around other details I can see the idle timeout is only ten minutes. I like to change it to thirty minutes to give me more thinking time and to make the notes on this page without it logging me out. 

switch>sh line vty 0   
   Tty Typ     Tx/Rx    A Modem  Roty AccO AccI   Uses   Noise  Overruns   Int
*    1 VTY              -    -      -    -    -      8       0     0/0       -

Line 1, Location: "", Type: "xterm-256color"
Length: 24 lines, Width: 80 columns
Baud rate (TX/RX) is 9600/9600
Status: PSI Enabled, Ready, Active, No Exit Banner, Ctrl-c Enabled
  Automore On, Notify Process
Capabilities: none
Modem state: Ready
Special Chars: Escape  Hold  Stop  Start  Disconnect  Activation
                ^^x    none   -     -       none         
Timeouts:      Idle EXEC    Idle Session   Modem Answer  Session   Dispatch
               00:10:00        never                        none     not set

This is how I change it to thirty minutes 

switch>en
Password: 
switch#conf t         
Enter configuration commands, one per line.  End with CNTL/Z.
switch(config)#line vty 0 15    
switch(config-line)#exec-timeout 30 0
switch(config-line)#exit
switch(config)#exit
switch#disa
switch>

Now the timeout is thirty minutes. 

switch>sh line vty 0
   Tty Typ     Tx/Rx    A Modem  Roty AccO AccI   Uses   Noise  Overruns   Int
*    1 VTY              -    -      -    -    -      8       0     0/0       -

Line 1, Location: "", Type: "xterm-256color"
Length: 24 lines, Width: 80 columns
Baud rate (TX/RX) is 9600/9600
Status: PSI Enabled, Ready, Active, No Exit Banner, Ctrl-c Enabled
  Automore On, Notify Process
Capabilities: none
Modem state: Ready
Special Chars: Escape  Hold  Stop  Start  Disconnect  Activation
                ^^x    none   -     -       none         
Timeouts:      Idle EXEC    Idle Session   Modem Answer  Session   Dispatch
               00:30:00        never                        none     not set

Create VLANs

Looking at the vlan setup doesn't require enable but changing it does. 

switch>sh vlan

VLAN Name                             Status    Ports
---- -------------------------------- --------- -------------------------------
1    default                          active    Gi1/0/1, Gi1/0/2, Gi1/0/3
                                                Gi1/0/4, Gi1/0/5, Gi1/0/6
                                                Gi1/0/7, Gi1/0/8, Gi1/0/9
                                                Gi1/0/10, Gi1/0/11, Gi1/0/12
                                                Gi1/0/13, Gi1/0/14, Gi1/0/15
                                                Gi1/0/16, Gi1/0/17, Gi1/0/18
                                                Gi1/0/19, Gi1/0/20, Gi1/0/21
                                                Gi1/0/22, Gi1/0/23, Gi1/0/24
                                                Gi1/0/25, Gi1/0/26, Gi1/0/27
                                                Gi1/0/28, Gi1/0/29, Gi1/0/30
                                                Gi1/0/31, Gi1/0/32, Gi1/0/33
                                                Gi1/0/34, Gi1/0/35, Gi1/0/36
                                                Gi1/0/37, Gi1/0/38, Gi1/0/39
                                                Gi1/0/40, Gi1/0/41, Gi1/0/42
                                                Gi1/0/43, Gi1/0/44, Gi1/0/45
                                                Gi1/0/46, Gi1/0/47, Gi1/0/48
                                                Gi1/0/49, Gi1/0/50, Gi1/0/51
                                                Gi1/0/52   
1002 fddi-default                     act/unsup 
1003 trcrf-default                    act/unsup 
1004 fddinet-default                  act/unsup 
1005 trbrf-default                    act/unsup

At this point everything is in VLAN1, which is the default configuration. However our goal here is to put ports into a relevant VLAN and turn off VLAN1. First we need to create some VLANs. Go into enable mode and conf t. 

switch>en  
Password: 
switch#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
switch(config)#vlan 2
switch(config-vlan)#name dmz
switch(config-vlan)#exit
switch(config)#exit
switch#
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