User guide

Functional Differences in Product Categories PPPoE

8-67

iMG/RG Software Reference Manual (ADSL Port)

requests for DNS primary and secondary IP addresses and, if received, assigns them to the DNS Client and

DNS relay lists respectively. This feature can be enabled via the commands:

pppoe set transport <pppoe_name> givedns client enabled|disabled

pppoe set transport <pppoe_name> givedns relay enabled|disabled

pppoe set transport <pppoe_name> discoverdns enabled|disabled

8.7.2.5 Configuration Option to Clamp Maximum TCP MSS Value

When using the PPPoE client on the iMG, either the iMG or the PPPoE concentrator/RAS should be configured

to clamp the maximum TCP MSS value. For PPPoE the maximum mss is 1452.

On the iMG the command to perform this is IP SET INTERFACE <ip interface> tcpmssclamp

enabled (Refer to 4.1.8.2.49.)

On a device such as one by Cisco, the command would be

ip tcp adjust -mss 1452.

Note: Without this clamp, connectivity issues could occur, and access to some websites could fail.

8.7.3 Functional Differences in Product Categories

8.7.4 PPPoE command reference

This section describes the commands available to enable, configure and manage the PPPoE module.

8.7.4.1 PPPoE CLI commands

The table below lists the PPPoE commands provided by the CLI:

TABLE 8-6 Functional Mapping for PPPoE

Commands

Fiber

E Modular

ADSL

PPPOE CONNECTIONS XXXXX X XXX

PPPOE CONNECTIONS OVER ATM -

VLAN UNAWARE

XXX

PPPOE CONNECTIONS - VLAN AWARE XXXXX X XXX

POPULATING AUTOMATICALLY ROUT-

ING TABLE AND DNS SERVER TABLE

XXXXX X XXX