Who initiate backup link?
Hi all When the frame relay connection between HQ's router and branch office's router failed, which router would initiate backup link? which router detects the link failure first? what decides which router does first? I will appreciate your reply j.w __ Do You Yahoo!? Yahoo! Messenger - Talk while you surf! It's FREE. http://im.yahoo.com/ _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Who initiate backup link?
In a message dated 10/26/00 6:09:06 PM Eastern Daylight Time, [EMAIL PROTECTED] writes: > Hi all > When the frame relay connection between HQ's router > and branch office's router failed, which router would > initiate backup link? Which router detects the link > failure first? what decides which router does first? > You should really specify what they have as backup in the first place. There are many different ways of backing up lines from HQ to branch. Some examples: On a router you could have serial 0 as the primary and then a lower bandwidth serial 1 as the backup. To do this, in interface s0 you would place "backup int s1 0 300". The 300 being the time s1 waits to go back down when it realizes that s0 came back up. If you are using HSRP then you would have 2 devices. One would be the active and the other on standby. All info is passed through the main until it goes down and then it automatically starts going through the standby which has now become the active. These both have much more detail to them but instead of me going into detail, I'm sure you could just read up on them. The book would be more accurate them me for sure. Hope I helped... Mark Zabludovsky ~ CCNA, CCDA, 1/4-NP [EMAIL PROTECTED] "If you need luck, apparently you're not prepared...Go study!" ~Mark Zabludovsky~ _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Who initiate backup link?
Thanks for your response. I forgot to mention that primary link is frame-relay and backup link is isdn link. Our company has HQ in San Francisco, and 4 branch offices are located around bay area. Not as a network expert, but as a ccnp wannabe, I was curious which router would initiate isdn backup link first between HQ router and branch router. My hunch is any router that detects link failure initiates isdn backup link first. am l right? Thanks in adv. --- [EMAIL PROTECTED] wrote: > In a message dated 10/26/00 6:09:06 PM Eastern > Daylight Time, > [EMAIL PROTECTED] writes: > > > > Hi all > > When the frame relay connection between HQ's > router > > and branch office's router failed, which router > would > > initiate backup link? Which router detects the > link > > failure first? what decides which router does > first? > > > > You should really specify what they have as backup > in the first place. There > are many different ways of backing up lines from HQ > to branch. Some examples: > > On a router you could have serial 0 as the primary > and then a lower bandwidth > serial 1 as the backup. To do this, in interface s0 > you would place "backup > int s1 0 300". The 300 being the time s1 waits to go > back down when it > realizes that s0 came back up. > > If you are using HSRP then you would have 2 devices. > One would be the active > and the other on standby. All info is passed through > the main until it goes > down and then it automatically starts going through > the standby which has now > become the active. > > These both have much more detail to them but instead > of me going into detail, > I'm sure you could just read up on them. The book > would be more accurate them > me for sure. Hope I helped... > > Mark Zabludovsky ~ CCNA, CCDA, 1/4-NP > [EMAIL PROTECTED] > > "If you need luck, apparently you're not > prepared...Go study!" > > >~Mark Zabludovsky~ __ Do You Yahoo!? Yahoo! Messenger - Talk while you surf! It's FREE. http://im.yahoo.com/ _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
Re: Who initiate backup link?
In a message dated 10/26/00 8:55:55 PM Eastern Daylight Time, [EMAIL PROTECTED] writes: > My hunch is > any router that detects link failure initiates isdn > backup link first. am l right? > Well, lets say at your branch office you had the config on serial 0 that I told you about where it specified that s1 was the backup interface (isdn). As soon as serial 0 dropped, serial 1 would come up/up and become your link untill the serial 0 came back. Serial 1 would stay up for that amount of time you specified (0 300) to make sure that serial 0 was back up for good. You could check on this by typing "show ip int brie". When this config is properly set up and serial 0 is up and stable you will see that serial 1 is not in a down/down state but instead in a standby/down state. This means it's on standby and ready to come up in case of primary failure. Hope this answers your questions... Mark Zabludovsky ~ CCNA, CCDA, 1/4-NP [EMAIL PROTECTED] "If you need luck, apparently you're not prepared...Go study!" ~Mark Zabludovsky~ _ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
