2000-A2-GB20-10
- 101 -
February 2004
Setting the
Port Maxi-
mum
Transmis-
sion Unit
The MTU setting controls IP fragmentation of packets transmitted through
the specified port. Packet whose size is greater than the MTU value are
fragmented to fit into the MTU size limit.
To set a maximum transmission unit value for a port, follow these steps:
1. Type
M
on the Router Configuration menu to select Configure Port Max
Transmission Unit.
1. The IAD displays the port table for this interface and prompts for a port.
Port VPI VCI Encapsulation Type
PCR
Service
1
0
40 RFC 1483 (with LLC Encap)3641
UBR
Total = 3641 cps
Maximum PCR this interface can support = 3622 cps
Select Port: [1-8]
Type the port number and press Enter.
2. The IAD displays the current configuration and a prompt:
Current MTU configuration for SDSL, Port 1 is 1500.
Enter New MTU for this Port >
Type the new MTU value (100-1500) and press Enter. (When set at
1500, IP fragmentation is disabled).
3. The IAD saves the changes.
4. Continue with other configuration tasks, or press Escape to return to
the Router Configuration menu.
5. Reset the IAD (page
14
) when you finish router configuration.
Enabling
and Dis-
abling RIP
When you enable RIP, the IAD sends routing data to adjacent routers and
dynamically learns the associated network topology.
Enabling RIP Globally
To enable (or disable) RIP globally, follow these steps:
1. Type
R
on the Router Configuration menu to select Enable/Disable
RIP.
2. The IAD displays the current status of RIP and a prompt:
RIP is currently DISABLED
Enter E to Enable, D to Disable:
Type
E
to enable RIP globally, or
D
to disable it globally.
3. The IAD saves the configuration and displays the Router Configuration
menu.
4. Continue with other configuration tasks, or press Escape to return to
the Main menu.
5. Reset the IAD (page
14
) when you finish router configuration.
Enabling and Disabling RIP Poisoned Reverse by Port
To enable or disable RIP poisoned reverse by port:
NOTE
For RIP to function correctly, you must enable RIP globally or
locally (by port) and set the RIP version. The order in which
you perform the procedures is irrelevant.
