Configuring a root switch on IOS based Cisco switches
When we use spanning tree a root switch is elected but when it comes to troubleshooting a switched network knowing where the root switch is makes it much easier. Another reason for "manually choosing" a root switch is that we can use our most powerfull switch to become the root.
To set the root switch for a particular VLAN is quite an easy task.
We use the following global configuration command:
Switch(config)#spanning-tree vlan vlan_id root primary
If we also want to manually set the backup root switch for the network we use the following command on our designated backup switch:
Switch(config)#spanning-tree vlan vlan_id root secondary
The vlan_id has to be the same in both command lines.
Also see ...
Enable Cisco Password Encryption
H3When setting a password against the console, auxiliary and vty lines on a cisco router, unless password encryption is switched on the passwords will be displayed when viewing the config on the terminal screen/H3Pdiv class="code"config terminal br /service password encryptionP br
H3When setting a password against the console, auxiliary and vty lines on a cisco router, unless password encryption is switched on the passwords will be displayed when viewing the config on the terminal screen/H3Pdiv class="code"config terminal br /service password encryptionP br
How to disable Cisco router domain name lookup
H3Ever foul up a command on a router or switch and have to sit there and wait for five minutes while it translates for the "domain" ?/H3PSimply enter global config mode and type br / br /router(config) span style="font weight: bold"no ip domain lookup/span br / br /There, no more
H3Ever foul up a command on a router or switch and have to sit there and wait for five minutes while it translates for the "domain" ?/H3PSimply enter global config mode and type br / br /router(config) span style="font weight: bold"no ip domain lookup/span br / br /There, no more
Changing an ACL on a Cisco Firewall
H3Although changing an ACL on a Firewall is almost exactly like a router, there are a couple nuances that people should know. Here are some tips and best practice material./H3P1. When you remove an access list, it is automatically removed from the interface. *This is a nice change from rout
H3Although changing an ACL on a Firewall is almost exactly like a router, there are a couple nuances that people should know. Here are some tips and best practice material./H3P1. When you remove an access list, it is automatically removed from the interface. *This is a nice change from rout
Cisco Router: Soft and Hard boot of BGP
H3Simple commands to reset BGP as a first step troubleshooting technique/H3PThere are two types of BGP "reboot" commands: soft and hard. You can also reset BGP in the direction of traffic flow with a soft reboot. br / br /div class="code"Router> clear ip bgp * soft in br / o
H3Simple commands to reset BGP as a first step troubleshooting technique/H3PThere are two types of BGP "reboot" commands: soft and hard. You can also reset BGP in the direction of traffic flow with a soft reboot. br / br /div class="code"Router> clear ip bgp * soft in br / o
Serial Point-to-Point Encapsulation Explained
H3This is an explanation of serial connection encapsulation (HDLC / PPP) and suggestions on it's use./H3PThere are a couple of different encapsulation methods for PtP connections. Making sure you choose the correct one for your network can be a daunting task. Hopefully, this article will pro
H3This is an explanation of serial connection encapsulation (HDLC / PPP) and suggestions on it's use./H3PThere are a couple of different encapsulation methods for PtP connections. Making sure you choose the correct one for your network can be a daunting task. Hopefully, this article will pro