User`s guide

162 XSR User’s Guide
Configuring DoD/BoD Chapter 8
Configuring Dialer Services
XSR(config)#interface dialer 1
XSR(config-if<D1>)#no shutdown
XSR(config-if<D1>)dialer pool 2
XSR(config-if<D1>)encapsulation ppp
! ppp pap sent-username boston password orbitor
XSR(config-if<D1>)dialer idle-timeout 20
XSR(config-if<D1>)dialer-group 7
XSR(config-if<D1>)dialer map ip 20.20.20.2 2400
XSR(config-if<D1>)ip address 20.20.20.4 255.255.255.0
The following command defines interesting packets for the dial out trigger by
configuring ACL 106 to pass all Type 8 source and destination ICMP packets
up to 20 idle seconds:
XSR(config)access-list 106 permit icmp any any 8
The following command maps ACL 1061 to dialer group 7:
XSR(config)#dialer-list 7 protocol ip list 106
Configuring DoD/BoD
The XSR supports Bandwidth-on-Demand (BoD), the ability to dynamically
change bandwidth during a multilink connection. DoD/BoD is performed by
configuring the following on a multilink bundle:
 The dialer idle timeout value to bring down an idle link when
triggered by interesting traffic specified by an Access Control List
(ACL). The link is brought down by the calling node.
 The multilink load threshold to trigger the dialer to add or delete a link.
This feature is controlled by the calling node.
 The minimum links value to maintain on the bundle. This feature is
controlled by the calling node.
 Bandwidth Allocation Protocol (BAP) values to negotiate with the
peer to add or drop links.
For information on configuring BAP on Dialer interfaces, refer to
“Configuring PPP” on page 103.
An example of the XSR’s Dial on Demand functionality is illustrated in the
topology shown in Figure 27.