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Home > Archive > CCNP > July 2003 > dialer load threshold vs. backup load ???
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dialer load threshold vs. backup load ???
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| Townsend 2003-07-25, 11:09 am |
| I am having trouble understanding when to use the "dialer load threshold" command and when to use the "backup load" command. Does anyone have info on what dictates the use of one command or the other.
Thanks! | |
| sukuvi 2003-07-25, 9:58 pm |
| Townsend,
"backup load" is used to support a primary line which is not a dialer but a permanent connection. And this command is used on the primary line interface. The e.g. in the book has Frame Relay as the primary line and ISDN as the backup. What I noticed here is that the primary line is not a dialer.
"dialer-load threshold" is used to backup a dialer, meaning the connection that this dialer is backing up is also a dialer, such as an ISDN with a Dial-on-Demand Routing (DDR). But to backup this connection when the bandwidth cannot support the traffic volume, you'll use this command on the interface to initiate another call to the same destination.
I haven't worked on Remote Access for over a year now so I was able to find this info in the book "Building Cisco Remote Access Networks" by Catherine Paquet, published by Cisco Press in 1999, ISDN 1578700914. I know this book was updated a few months ago with the same title by the same author.
I hope my info helps and Good Luck!!! | |
| SureshHomepage 2003-07-26, 1:28 am |
| Sukuvi is right. Let me explain in my own words.
Backup Load:
When the load on the serial interface of a Frame relay link exceeds a threshold limit(say 85% capacity), the back up line comes to the rescue by establishing a second connection to the destination.
Load-threshold:
Its a pure ISDN terminology....No frame relay reference here. You got 2 ISDN channels, B1 & B2. You can set a 'maximum' load on B1. When this value is exceeded another call is placed on the B2 channel. Its just that simple! | |
| Townsend 2003-07-26, 8:52 am |
| Thanks guys!
I really appreciate the assistance.
You've been a great help! |
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