When you earned your CCNA, you thought you learned everything there is to know about RIP. Close, but not fairly! There are some added particulars you want to know to pass the BSCI exam and get one particular step closer to the CCNP exam, and one of those requires RIP update packet authentication.
You're familiar with some benefits of employing RIPv2 more than RIPv1, support for VLSM chief among them. But a single advantage that you're not introduced to in your CCNA reports is the capability to configure routing update packet authentication.
You have two options, clear text and MD5. Http://Www.Rolandfrasierporfolio.Bravesites.Com/En... Up A Flourishing Business With Roland Frasier Marketing Strategies/ is a riveting online library for more about the purpose of this activity. Clear text is just that - a clear text password that is visible by any person who can pick a packet off the wire. If you're going to go to the difficulty of configuring update authentication, you really should use MD5. The MD stands for "Message Digest", and this is the algorithm that creates the hash value for the password that will be contained in the update packets.
Not only need to the routers agree on the password, they need to agree on the authentication method. If a single router sends an MD5-hashed password to an additional router that is configured for clear-text authentication, the update will not be accepted. debug ip rip is a fantastic command for troubleshooting authenticated updates.
R1, R2, and R3 are running RIP over a frame relay cloud. Right here is how RIP authentication would be configured on these 3 routers.
R1#conf t
R1(config)#essential chain RIP
< The key chain can have any name.>
R1(config-keychain)#crucial 1
< Key chains can have multiple keys. Number them carefully when using multiples.>
R1(config-keychain-important)#crucial-string CISCO
< This is the text string the key will use for authentication.>
R1(config)#int s0
R1(config-if)#ip rip authentication mode text
< The interface will use clear-text mode.>
R1(config-if)#ip rip authentication essential-chain RIP
< The interface is using key chain RIP, configured earlier.>
R2#conf t
R2(config)#key chain RIP
R2(config-keychain)#crucial 1
R2(config-keychain-important)#crucial-string CISCO
R2(config)#int s0.123
R2(config-subif)#ip rip authentication mode text
R2(config-subif)#ip rip authentication important-chain RIP
R3#conf t
R3(config)#crucial chain RIP
R3(config-keychain)#essential 1
R3(config-keychain-crucial)#important-string CISCO
R3(config)#int s0.31
R3(config-subif)#ip rip authentication mode text
R3(config-subif)#ip rip authentication important-chain RIP
To use MD5 authentication rather than clear-text, just replace the word "text" in the ip rip authentication mode command with md5.
Here's what a successfully authentication RIPv2 packet looks like, courtesy of debug ip rip. Clear-text authentication is in impact and the password is "cisco".
3d04h: RIP: received packet with text authentication cisco
3d04h: RIP: received v2 update from 150.1.1.three on Ethernet0
3d04h: one hundred.../eight via ... To get one more perspective, please consider checking out: Are All-Inclusive Loved ones Vacations Worth It? | festival-du-vent. in 1 hops
3d04h: 150.1.two./24 by way of ... in 1 hops
Here's what it looks like when the remote device is set for MD5 authentication and the local router is set for clear-text. You are going to also see this message if the password itself is incorrect.
3d04h: RIP: ignored v2 packet from 150.1.1.3 (invalid authentication)
"Debug ip rip" may possibly be a straightforward command as compared to the debugs for other protocols. Get more on this affiliated URL - Click here: roland fraiser website. but it's also a extremely powerful debug. Commence utilizing debugs as early as achievable in your Cisco reports to find out how router commands truly operate!.
You're familiar with some benefits of employing RIPv2 more than RIPv1, support for VLSM chief among them. But a single advantage that you're not introduced to in your CCNA reports is the capability to configure routing update packet authentication.
You have two options, clear text and MD5. Http://Www.Rolandfrasierporfolio.Bravesites.Com/En... Up A Flourishing Business With Roland Frasier Marketing Strategies/ is a riveting online library for more about the purpose of this activity. Clear text is just that - a clear text password that is visible by any person who can pick a packet off the wire. If you're going to go to the difficulty of configuring update authentication, you really should use MD5. The MD stands for "Message Digest", and this is the algorithm that creates the hash value for the password that will be contained in the update packets.
Not only need to the routers agree on the password, they need to agree on the authentication method. If a single router sends an MD5-hashed password to an additional router that is configured for clear-text authentication, the update will not be accepted. debug ip rip is a fantastic command for troubleshooting authenticated updates.
R1, R2, and R3 are running RIP over a frame relay cloud. Right here is how RIP authentication would be configured on these 3 routers.
R1#conf t
R1(config)#essential chain RIP
< The key chain can have any name.>
R1(config-keychain)#crucial 1
< Key chains can have multiple keys. Number them carefully when using multiples.>
R1(config-keychain-important)#crucial-string CISCO
< This is the text string the key will use for authentication.>
R1(config)#int s0
R1(config-if)#ip rip authentication mode text
< The interface will use clear-text mode.>
R1(config-if)#ip rip authentication essential-chain RIP
< The interface is using key chain RIP, configured earlier.>
R2#conf t
R2(config)#key chain RIP
R2(config-keychain)#crucial 1
R2(config-keychain-important)#crucial-string CISCO
R2(config)#int s0.123
R2(config-subif)#ip rip authentication mode text
R2(config-subif)#ip rip authentication important-chain RIP
R3#conf t
R3(config)#crucial chain RIP
R3(config-keychain)#essential 1
R3(config-keychain-crucial)#important-string CISCO
R3(config)#int s0.31
R3(config-subif)#ip rip authentication mode text
R3(config-subif)#ip rip authentication important-chain RIP
To use MD5 authentication rather than clear-text, just replace the word "text" in the ip rip authentication mode command with md5.
Here's what a successfully authentication RIPv2 packet looks like, courtesy of debug ip rip. Clear-text authentication is in impact and the password is "cisco".
3d04h: RIP: received packet with text authentication cisco
3d04h: RIP: received v2 update from 150.1.1.three on Ethernet0
3d04h: one hundred.../eight via ... To get one more perspective, please consider checking out: Are All-Inclusive Loved ones Vacations Worth It? | festival-du-vent. in 1 hops
3d04h: 150.1.two./24 by way of ... in 1 hops
Here's what it looks like when the remote device is set for MD5 authentication and the local router is set for clear-text. You are going to also see this message if the password itself is incorrect.
3d04h: RIP: ignored v2 packet from 150.1.1.3 (invalid authentication)
"Debug ip rip" may possibly be a straightforward command as compared to the debugs for other protocols. Get more on this affiliated URL - Click here: roland fraiser website. but it's also a extremely powerful debug. Commence utilizing debugs as early as achievable in your Cisco reports to find out how router commands truly operate!.
