User's Manual

Navini Networks, Inc. Ripwave Base Station I&C Guide
Part #40-00047-00 Rev D v1.0 81
February 28, 2003
For this reason, the BTS only allows you to enter odd addresses in the range XXX.XXX.XXX.1
to XXX.XXX.XXX.253 in this field. The standby field is only displayed for your convenience
and cannot be altered. Note that the BTS automatically handles switching the address when a
failure occurs on an active Controller card, requiring the standby Controller to go into service.
However, the MAC addresses remain fixed.
Coupled with any IP configuration is a need to specify the corresponding subnet mask. Refer to
common network administration literature for guides on addresses, networks, masks, and
gateways. In short, the subnet mask identifies the portion of the IP address that is common to
those devices connected to the same Ethernet. The most important “other” device is the BTS’s
default gateway (specified later).
The portion is identified using a logical “and” of the mask with the address. For example, a
subnet mask of 255.255.0.0. and with an IP address of 172.16.23.182 yields a network of
172.16.x.x. In this case, the default gateway must also be on the 172.16.x.x network. The BTS
requires that this association be met. If not, you will be asked to try again.
netmask on enet : 255.255.0.0
The BTS uses a high-speed Serial Line Internet Protocol (SLIP) connection to communicate with
the redundant T1/Controller Card. This interface is only used internally and has a fixed subnet
mask of 255.255.255.252.
The host portion of the address - that is the least significant 2 bits - is automatically provided by
the software based upon slot ID. However, you may want to alter the default network address to
avoid conflict with your network.
The BTS is shipped with the 10.0.0.0 network as the internal network. This is a reserved network
not used on the Internet. However, if your private network utilizes this private address space, you
may need to change it to avoid the conflict.
ip on backplane : 10.0.0.1
As for the default gateway for the BTS, all traffic routed outside the directly connected Ethernet
port goes through the gateway. Furthermore, the gateway must be reachable on the directly
connected Ethernet port. Therefore, the BTS will prevent you from entering a default gateway
address that fails the logical “and” test discussed previously. This address is specified on the line
item shown below:
gateway on enet : 172.16.0.100