[16NG] RE: review of draft-ietf-16ng-ip-over-ethernet-over-802.16-00

Hello Max

Thanks. From your explain, you mentioned two method can be used to know about the IP addresses:

1) Intercepting the DHCP message exchange;

2)Just looking at the source IP addresses of upstream packets.

To the method 1) , it will need DHCP stack to do that.

As to the method 2) ,if that means we have to monitor the source IP address of every packets. Otherwise , we can make sure when the MS/SS change it’s address.

Right?

Best Rgds,

Thanks,

发件人: Riegel, Maximilian [mailto:maximilian.riegel at siemens.com]
发送时间: 2007年1月31日 2:56
收件人: john.zhao at huawei.com
抄送: 16ng at ietf.org
主题: RE: review of draft-ietf-16ng-ip-over-ethernet-over-802.16-00

Hi John.zhao,

ProxyARP must know about the IP addresses being used by the SS/MSs. The information can be retrieved by intercepting the DHCP message exchange or just looking at the source IP addresses of upstream packets.

With this information Proxy ARP can respond to ARP messages instead of broadcasting the message to all the SS/MSs.

Bye

Max

From: John.zhao [mailto:john.zhao at huawei.com]
Sent: Tuesday, January 30, 2007 8:51 AM
To: Riegel, Maximilian
Cc: 16ng at ietf.org
Subject: review of draft-ietf-16ng-ip-over-ethernet-over-802.16-00

Hi Max,

In section 7.3, there is a sentence that ‘The unicast IPv4 addresses can be learned by examining the source address of packets or DHCP Response message.’ But why this operation is needed? And if we will need the layer-3 operation in this place?

Best Rgds,

Thanks,

John.zhao