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ipv6_sfr_adsl [2014/01/12 01:59] sameripv6_sfr_adsl [2014/01/16 17:26] (current) – [IPv6 Packet Capture] samer
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 ====== IPv6 with SFR ====== ====== IPv6 with SFR ======
  
-SFR has now activated the IPv6 support on its ADSL boxes. Here are some snapshots of the configuration interface of a NeufBox 4 :+SFR has activated in august 2011 the IPv6 support on its ADSL boxes. Here are some snapshots of the configuration interface of a NeufBox 4 :
 [{{ :ipv6-sfr-box-iface-1.png?direct&400 |Figure 1. IPv6 activation on SFR box}}] [{{ :ipv6-sfr-box-iface-1.png?direct&400 |Figure 1. IPv6 activation on SFR box}}]
 [{{ :ipv6-sfr-box-iface-2.png?direct&400 | Figure 2. IPv6 parameters on SFR box}}] [{{ :ipv6-sfr-box-iface-2.png?direct&400 | Figure 2. IPv6 parameters on SFR box}}]
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 ===== IPv6 Packet Capture ===== ===== IPv6 Packet Capture =====
-Starting from an active IPv6 ADsL connection, let us analyse a typical Router Advertisement (RA) packet sent by a NeufBox. IPv6 routers (here the NeufBox) send unsolicited Router Advertisement messages pseudo-periodically and solicited Router Advertisement messages in response to the receipt of a Router Solicitation message. The Router Advertisement message contains the information required by hosts to determine the link prefixes, the link MTU, whether or not to use address autoconfiguration, and the duration for which addresses created through address autoconfiguration are valid and preferred. The packet capture given hereafter shows some interesting features of the IPv6 deployment by SFR: 
  
-The router lifetime is set to the default 30 minute value. +The SFR ADSL box, as a typical IPv6 router, sends unsolicited Router Advertisement messages pseudo-periodically and solicited Router Advertisement messages in response to the receipt of a Router Solicitation message. The Router Advertisement message contains the information required by hosts to determine the link prefixes, the link MTU, whether or not to use address autoconfiguration, and the duration for which addresses created through address autoconfiguration are valid and preferred. The packet capture given hereafter shows some interesting features of the IPv6 deployment by SFR: 
-The prefix length is /64, whereas a /56 prefix is announced on the web interface. + 
-The valid lifetime is equal to the preferred lifetime ! A typical valid lifetime value is grater than the preferred lifetime in order to enable a soft renumbering of the hosts. +  - The router lifetime is set to the default 30 minute value. 
-A recursive DNS server is given according to the recent RFC 6106 (obsoleting RFC 5006). +  The prefix length is /64 (part of the /56 prefix announced on the web interface as seen in Figure 2)
-The Home Agent Flag is set and a Home Agent option is included int he RA ! This indicates that the NeufBox is serving as a home agent on this link, according to RFC 6275 on mobility support in IPv6.+  The valid lifetime is equal to the preferred lifetime! A typical valid lifetime value is greater than the preferred lifetime in order to enable a soft renumbering of the hosts. 
 +  A recursive DNS server is given according to the recent [[http://tools.ietf.org/html/rfc6106 | RFC 6106]] (obsoleting RFC 5006). 
 +  The Home Agent Flag is set and a Home Agent option is included int he RA! This indicates that the NeufBox is serving as a home agent on this link, according to [[http://tools.ietf.org/rfc/rfc6275.txt | RFC 6275]] on mobility support in IPv6. 
 + 
 +<code>
 No. Time Source Destination Protocol Info No. Time Source Destination Protocol Info
 88 30.577228 fe80::217:33ff:fef2:XXXX ff02::1 ICMPv6 Router advertisement from 00:17:33:f2:XX:XX 88 30.577228 fe80::217:33ff:fef2:XXXX ff02::1 ICMPv6 Router advertisement from 00:17:33:f2:XX:XX
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 Home Agent Preference: 10 Home Agent Preference: 10
 Home Agent Lifetime: 1800 Home Agent Lifetime: 1800
- +</code>
- +
ipv6_sfr_adsl.1389488376.txt.gz · Last modified: 2014/01/12 01:59 by samer