Zhone 2000 用户手册

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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

) when you finish router configuration.

When you enable RIP, the IAD sends routing data to adjacent routers and 
dynamically learns the associated network topology. 

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

) when you finish router configuration.

To enable or disable RIP poisoned reverse by port:

 

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.