Nokia T66520, MW1122 user manual Dynamic Host Configuration Protocol, ATM and Adsl

MW1122 User Manual

Application Layer Gateway functionality (ALG). MW1122 has ALG for the following protocols/applications:

DICMP

DFTP

DH.323 including NetMeeting

DCUSeeMe

DPPTP

DIRC

DIPSEC ESP tunnel mode and IKE

Note, that most IPSEC implementations will fail when passed through NAPT. A typical reason is that the identification may fail if the identification is based on IP address. Also, only tunnel mode without Authentication Header (AH) works.

4.5Dynamic Host Configuration Protocol

MW1122 can act as a Dynamic Host Configuration Protocol (DHCP) server for the PCs on the end-user home network. In this mode, MW1122 can assign up to 253+253 consecutive addresses from two separate address ranges (that is, 253 consecutive addresses per address range) to the PCs on the home network. Two separate address ranges are used when LAN and WLAN are operating as separate subnets. MW1122 can also act as a DHCP relay agent and relay the DHCP requests to an external DHCP server.

4.6ATM and ADSL

MW1122 supports up to 8 simultaneous VCCs and supports UBR (Unspecified bit rate) traffic shaping on all VCCs. The maximum transmit rate on each VCC is the ADSL upstream capacity. If more than one VCC is transmitting simultaneously, the ADSL upstream capacity is temporarily shared between these VCCs. When one VCC is idle, the bandwidth is used by another VCC.

The ADSL transmission is based on the DMT line code. MW1122 provides a DMT line rate up to 8 Mbit/s downstream and up to 800 kbit/s upstream. The DMT transceiver is rate adaptive and capable of providing faster rates over short distances or slower rates over long distances. The transceiver adapts itself to the line conditions. MW1122 supports also ADSL Lite. In the ADSL Lite mode, the maximum line rates are 1536 kbit/s downstream and 512 kbit/s upstream.

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