| l, before I begin explaining this week’s | | | | number on the interface. (By default the group |
| article; I would like to say, Happy holidays to all | | | | number is 0) |
| of my readers; because of you it’s | | | | And, the priority argument portion of the |
| been a very astounding year! | | | | command; is used to set the priority value that |
| Now, that I’ve humbly thanked all of you, | | | | prioritizes a potential Hot Standby router. The |
| let’s move on to this week’s article. | | | | range is from 1 to 255, where 1 means the |
| Well, if you’re planning to run the Hot | | | | lowest priority and 255 means the highest priority. |
| Standby Router Protocol (HSRP) within your Cisco | | | | The default priority value is 100. The router in the |
| environment. You’ll need to have at least | | | | HSRP group with the highest priority value |
| two Hot Standby Routers to form a HSRP group, | | | | becomes the active router. |
| and one of these routers will need to be | | | | Example:router>enablerouter#configure |
| configured to act as the active router. So, | | | | terminalrouter(config)#interface fastethernet 0 |
| that’s when you’ll need to use the | | | | 0router(config-if)#standby ip |
| standby priority command. | | | | 172.19.107.254router(config-if)#standby priority |
| Basically, the Cisco IOS interface command | | | | 110router(config-if)#endrouter#copy run start |
| named standby priority is used to set a | | | | In the above example, the router’s |
| Hot Standby Router’s priority. It is applied | | | | fastethernet 0/0 interface will have the (standby) |
| to the interface that is participating in a HSRP | | | | priority of 110. |
| group (that is the interface that’s | | | | If you need to restore a router’s interface |
| communicating with another HSRP router). | | | | back to its default values, all you need to do is |
| And, within an HSRP group, the router’s | | | | type the word no in front of the |
| interface that has the highest priority; is the | | | | command like you see below:router(config-if)#no |
| router that will become the active router. | | | | standby priority |
| By default, all Cisco routers belong to HSRP group | | | | And, if you plan on using the command in an IPv6 |
| 0. | | | | environment; make sure your Cisco IOS routers |
| Below is the correct syntax and example of the | | | | are running 12.4(4)T or higher. |
| standby priority command: | | | | I hope this article was very informative and |
| Syntax: standby [group-number] priority priority | | | | helped you quickly understand the usage of the |
| The optional group-number argument | | | | standby priority interface configuration |
| portion of the command; is used to set the group | | | | command. |