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利用SLIP协议拨号上网的整个过程
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Randy Lu  
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 More options Feb 9, 9:39 pm
From: Randy Lu <luxiao2...@gmail.com>
Date: Thu, 9 Feb 2012 18:39:58 -0800 (PST)
Local: Thurs, Feb 9 2012 9:39 pm
Subject: 利用SLIP协议拨号上网的整个过程
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大家好，我最近在看网络方面的一些资料，对SLIP链路层谢谢有一些小疑问，问题如下：
通过SLIP协议拨号上网时，本地主机是如何知道自己的IP地址？其整个流程是怎么样的？

 
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Shuo Chen  
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 More options Feb 10, 2:28 am
From: Shuo Chen <giantc...@gmail.com>
Date: Thu, 9 Feb 2012 23:28:46 -0800 (PST)
Local: Fri, Feb 10 2012 2:28 am
Subject: Re: 利用SLIP协议拨号上网的整个过程
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http://en.wikipedia.org/wiki/Point-to-point_protocol#Automatic_self_c...

另外拨号上网是PPP协议，不是SLIP。

On Feb 10, 10:39 am, Randy Lu <luxiao2...@gmail.com> wrote:


 
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jinhu wang  
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 More options Feb 10, 3:04 am
From: jinhu wang <wangjinhu...@gmail.com>
Date: Fri, 10 Feb 2012 16:04:23 +0800
Local: Fri, Feb 10 2012 3:04 am
Subject: Re: [TL] 利用SLIP协议拨号上网的整个过程
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共同学习：）
http://s-tools1.juniper.net/solutions/literature/white_papers/200187.pdf
在 2012年2月10日 上午10:39，Randy Lu <luxiao2...@gmail.com>写道：


 
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jinhu wang  
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 More options Feb 10, 3:08 am
From: jinhu wang <wangjinhu...@gmail.com>
Date: Fri, 10 Feb 2012 16:08:17 +0800
Local: Fri, Feb 10 2012 3:08 am
Subject: Re: [TL] 利用SLIP协议拨号上网的整个过程
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PPP includes a process for assigning Layer 3 attributes using network
control protocols (NCPs).
The NCP used to assign IP addresses within a PPP connection is IP Control
Protocol (IPCP).
IPCP is described in RFC 1332.
The separation between link establishment and IP address allocation makes
it possible to figure
out who the subscriber is before deciding how to treat his session:  Either
terminate the session
locally or tunnel the session to a wholesaler.  The domain name provided in
the user’s
credentials enables automated service or ISP selection. This powerful
aspect of PPP is a key
reason dictating why PPP will remain the predominant session protocol for
providers that are
offering wholesale services to third party ISPs.

在 2012年2月10日 下午4:04，jinhu wang <wangjinhu...@gmail.com>写道：


 
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jinhu wang  
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 More options Feb 10, 3:31 am
From: jinhu wang <wangjinhu...@gmail.com>
Date: Fri, 10 Feb 2012 16:31:05 +0800
Local: Fri, Feb 10 2012 3:31 am
Subject: Re: [TL] 利用SLIP协议拨号上网的整个过程
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借这个话题引申一下unnumberred接口。路由器上，往往会考虑节省ip地址资源而将对外的以太端口设置成unnumbered接口，这样的接口的特点是 没有自己的ip地址，它们会借用主机的或者主端口的ip地址工作。
把这样的接口跟ip协议栈对接往往会遇到mac地址如何获取的问题。这样的ip地址掩码往往是全f，也就是说这个子网只有一个ip地址，跟对端端口不在同一网络 ，从而导致了标准的ARP协议没法工作。于是不同的厂商会对这样的端口有不同的实现方式，有的厂商用固定的预留mac地址作为目标地址，有的厂商修改ARP协议 以适应这一特殊场景，间接的导致了不同厂商的路由器通过unnumberred端口无法对接。

在 2012年2月10日 下午4:08，jinhu wang <wangjinhu...@gmail.com>写道：


 
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xiaomin lu  
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 More options Feb 10, 5:03 am
From: xiaomin lu <luxiao2...@gmail.com>
Date: Fri, 10 Feb 2012 18:03:34 +0800
Local: Fri, Feb 10 2012 5:03 am
Subject: Re: [TL] Re: 利用SLIP协议拨号上网的整个过程
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SLIP也可以的，不过它是一种很老的拨号上网方式

2012/2/10 Shuo Chen <giantc...@gmail.com>


 
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