User's Manual

Navini Networks, Inc. Ripwave Base Station I&C Guide
82
line length (ft) : 500
Finally, the T1s timing source must be specified. A T1 uses only one timing source either at the
near-end or far-end of the line. You may select the BTS as the originator of the timing source by
selecting “local”, or you may select the far-end as the timing reference by selecting “loop”.
line clock source : loop [loop|local]
IMA Configuration
If you decide to utilize IMA groups to pool the T1 resources, then the same parameters described
for the ATM/T1 Configuration above also apply to configuring IMAs. Refer to Exhibit 5.
Exhibit 5: IMA Configuration
date and time : 08/21/2001[10:22]
ems inet : 172.16.0.10
snmp community : public
traffic path : atm
mac address : 00:04:6a:00:01:20
ip on enet (active) : 172.16.23.181
ip on enet (standby) : 172.16.23.182
netmask on enet : 255.255.0.0
ip on atm (active) : 172.17.0.101
ip on atm (standby) : 172.17.0.102
netmask on atm : 255.255.0.0
ip on backplane : 10.0.0.1
gateway on atm : 172.17.0.100
In addition, the ATM interface must be specified as IMA and reference one of two IMA groups
used for the Management PVC. This IMA group must match what is identified in the EMS. Use
“0” for the first group and “1” for the second group.
Each group identifies a set of T1 ports that are being combined to form one larger virtual port.
For the sake of boot parameter specification, ALL T1 interfaces for the Management PVCs IMA
group are assumed to be identical. So the parameters for T1 specifications apply to all T1s of the
IMA group:
pvc type-atm i/f : ima-0
Once the IMA interface is selected, a set of IMA parameters must be specified for the IMA
group used by the Management PVC. An IMA group inherently supports dynamic addition and
drops of individual T1 facilities from the group to facilitate fault tolerance to failed T1 facilities.
The minimum number of T1 ports, or links, that must exist for the IMA group to function is
specified here. A value from 1-7 is required for each one of the receive and transmit directions.
Separate the values with “:”. You can increase the values from the default of 1 link in each
direction or accept the default by pressing the Enter key.