Technical data

Step 6—Testing Connections to the Cisco AS5300
Dial Solutions Quick Configuration Guide
3-14
!
dialer-list 2 protocol ip permit
!
line con 0
line vty 0 4
!
end
Tips
To display the actual load currently assigned to the interface, enter the show interface bri 0:1
command. Search for the output field “load x/255. SNMP can be used to monitor the load on an
interface. How you set the threshold depends on each site’s characteristics, such as traffic patterns
and WAN costs. If you are in an environment where all calls are local, then you might nail up the
connections full time.
Large ISDN phone bills arise due to failure to appropriately tune filters and load thresholds.
Filters are dialer lists, which are applied with dialer groups. The dialer-list command and
dialer-group command control the first B channel. The dialer load-threshold command
controls the behavior when additional B channels are connected.
In this case study, the Cisco AS5300 does not dial out to the remote sites. Therefore, you do not
need to tune the central site’s dialer threshold setting. Only the remote side is in charge of opening
and closing channels based on the settings of the dialer commands.
Make sure you configured the correct SPID numbers on the BRI interface.
Step 6—Testing Connections to the Cisco AS5300
The test strategy is to ping the Cisco AS5300’s WAN port then ping the backbone behind the access
server. Cisco recommends you ping the domain name server (DNS) on the backbone, since this
device should always be up and operational.
Pinging a next hop IP address can have complications in an IP-unnumbered environment.
For example, complications arise when WAN interfaces are configured with IP unnumbered.
Note The typical low-level test to verify connectivity in a sync PPP environment is to ping a device
on the other end of the WAN link. In a modem environment (async PPP), the low-level test is to get
an EXEC shell established on the router.