User`s manual

CR-SEB
A telnet window will open up. The first line is the version of the CR-SEB firmware followed by the
prompt:
SEM>
If the CR-SEB is to transmit data to devices not on its subnet, a default router must be specified. To enter
the default routing address use the
route command.
route add default <xxx.xxx.xxx.xxx> {yyy.yyy.yyy.yyy}
Where x is the IP address of the gateway device and y is the optional netmask number.
To configure a CR-SEB as a master device, use the
bridge command:
bridge master<CR>
Store the changed configuration parameters in non-volatile memory with the
save command:
save<CR>
The CR-SEB will report back the time it took to the save the information. Reset the CR-SEB by typing:
reset<CR>
The CR-SEB can also be reset by cycling power. Whenever a reset is executed on the CR-SEB, the telnet
session will be lost. It will take the CR-SEB about 30 seconds to reinitialize after a reset or after cycling
power.
Note: Failure to save and reset will result in the factory defaults being used.
Filtering
The CR-SEB includes provision for filtering of multicast and broadcast packets. In many networks, there
is sufficient multicast and/or broadcast packets to slow the overall performance of the CR-SEB. Based on
the number of broadcast and multicast packets, they can consume a substantial amount of the RF
bandwidth. By turning filtering on, the CR-SEB will ignore these packets and limit transmission to
packets with specific device addresses. In some instances, it will be desired to have the CR-SEB transmit
the multicast and broadcast packets; in this instance filtering should be disabled. Note that filtering
broadcast packets also filters multicast packets but filtering multicast packets does not filter broadcast
packets. To filter broadcast and multicast packets use the bridge filter command:
bridge filter bcast<CR>
Refer to the section Bridge Commands for details of the filter commands.
DHCP
A DHCP server can set the CR-SEB IP address as well as the default route IP address. This is
accomplished by setting the desired default route IP address in the DHCP server using Option 3. A DHCP
server will not overwrite a previously entered default router IP address in the CR-SEB. If a DHCP server
is not used to set the default router IP address, one must be entered using the
route command. See the
previous section for details of the route command. If an IP address has previously been entered into the
CR-SEB but a DHCP server is to be used to assign an IP address, it will be necessary to set the IP address
in the CR-SEB to 0.0.0.0 using the
ip command.
2000- 2004 Cirronet Inc 14 M-2410-0025 Rev A