| y’s article, I’m going to quickly | | | | common on a router it wouldn’t have any |
| inform you about the Cisco IOS global | | | | effect.unique — And, this (optional) |
| configuration mode command named aaa | | | | keyword is used to make sure that only the |
| session-id. | | | | corresponding service access-requests and |
| Network administrators use the aaa | | | | accounting-requests will maintain a common |
| session-id command to indicate whether the | | | | session ID. |
| same session ID will be used for each AAA | | | | Note: Accounting-requests for each service will |
| accounting service type within a call or whether a | | | | have a different session ID. |
| different session ID will be assigned to each | | | | Below is an example of the command being used: |
| accounting service type. | | | | Router>enable |
| In other words, CCNA’s (like you) use the | | | | Router#configure terminal |
| command to tell a router to store or not to store | | | | Router(config)#aaa model |
| its first session ID request of a call in a common | | | | Router(config)#aaa authentication ppp default |
| database; if the first session ID is stored, then all | | | | group radius |
| proceeding session ID requests will retrieve the | | | | Router(config)#radius-server host 101.100.1.34 |
| value of the first session ID. (This is the | | | | Router(config)#radius-server attribute 44 |
| router’s default behavior). | | | | include-in-access-req |
| And, if the first session ID is not stored, then the | | | | Router(config)#aaa session-id unique |
| session ID in the access-request will be the same | | | | Router(config)#exit |
| as the session ID in the accounting request for | | | | In the example above, the router is being |
| the same service; all other services (Auth-Proxy, | | | | configured to use unique session IDs. |
| Exec, Network, Command, System, Connection, | | | | Now in order to return a router back to its |
| and Resource) will provide unique session IDs for | | | | default behavior, all you have to do is type the |
| the same call. | | | | word no in front of the command like you |
| Below is the command’s syntax:aaa | | | | see below: |
| session-id [common | unique] | | | | Router(config)#no aaa session-id unique |
| As you can see, you can use either the | | | | By the way, if you decide to use the command, |
| command keyword or the unique | | | | make sure your router(s) is running Cisco IOS |
| keyword with the command.common — | | | | 12.2(8)T or higher. |
| This (optional) keyword is used to make sure that | | | | I hope this article was very informative and |
| all session identification (ID) information that is | | | | helped you quickly understand the usage of the |
| sent out for a given call is identical. Remember, | | | | aaa session-id unique command. If you need to |
| even if you don’t configure a router using | | | | learn more; I suggest you visit my website, were |
| the common keyword, the router will | | | | you’ll find the latest information regarding |
| perform this way by default. So, in actuality; if | | | | the Cisco CCNA (640-553) Security exam |
| you were to type the command no aaa session-id | | | | techniques. |