DHCPv6 Option 18 (interface-id) relay problem
Christian Kratzer
ck-lists at cksoft.de
Thu Nov 8 15:18:23 UTC 2012
Hi,
On Thu, 8 Nov 2012, Andreas Hanke wrote:
> Hi Christian,
>
> I already tested that and it did not work :-(
>
> In my first mail I added the package capture with and without CISCO/DSLAM
sorry. I never noticed those files.
I am not too familiar with pdml files and wireshark does not seem to be able to import them but lets try to make sense of following:
with CISCO and DSLAM:
<field name="" show="Interface-Id" size="23" pos="96" value="0012001347524531312065746820322f312f30312f3231">
<field name="dhcpv6.option.type" showname="Option: Interface-Id (18)" size="2" pos="96" show="18" value="0012"/>
<field name="dhcpv6.option.length" showname="Length: 19" size="2" pos="98" show="19" value="0013"/>
<field name="dhcpv6.option.value" showname="Value: 47524531312065746820322f312f30312f3231" size="19" pos="100" show="47:52:45:31:31:20:65:74:68:20:32:2f:31:2f:30:31:2f:32:31" value="47524531312065746820322f312f30312f3231"/>
<field name="" show="Interface-ID: GRE11 eth 2/1/01/21" size="19" pos="100" value="47524531312065746820322f312f30312f3231"/>
</field>
without CISCO and DSLAM:
<field name="" show="Interface-Id" size="9" pos="84" value="0012000548414c4c4f">
<field name="dhcpv6.option.type" showname="Option: Interface-Id (18)" size="2" pos="84" show="18" value="0012"/>
<field name="dhcpv6.option.length" showname="Length: 5" size="2" pos="86" show="5" value="0005"/>
<field name="dhcpv6.option.value" showname="Value: 48414c4c4f" size="5" pos="88" show="48:41:4c:4c:4f" value="48414c4c4f"/>
<field name="" show="Interface-ID: HALLO" size="5" pos="88" value="48414c4c4f"/>
</field>
If I try to decode the option.values displayed in Hex then
for the first case the option value of "47524531312065746820322f312f30312f3231" seems to be: "GRE11 eth 2/1/01/21"
In the second case the option value of "48414c4c4f" it seems to be: "HALLO"
The pdml is quite confusing as it adds the option name when decoding the value.
So your syntax should work as follows for the first case with CISCO and DSLAM:
host ws {
host-identifier option dhcp6.interface-id "GRE11 eth 2/1/01/21"
fixed-address6 2001:db8:1:1::701;
}
and as follows for the second case without CISCO and DSLAM
host ws {
host-identifier option dhcp6.interface-id "HALLO"
fixed-address6 2001:db8:1:1::701;
}
Greetings
Christian
>
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Christian Kratzer CK Software GmbH
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