Hi,
On Wed, 31 May 2017, Pshem Kowalczyk wrote:
I haven't worked with this particular switch, but does it act as a
relay-agent? I.e is the message you get a RELAY-FWD one (type 12) with the
actual message inside? If so you could unpack the switch IP address from
the outer message and use option 18 to id the port.
it is a plain layer2 config with the ipv6 lightweight dhcp relay agent (ldra)
that transparently inserts the dhcp options into the packets
http://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst4500/XE3-9-0E/15-25E/configuration/guide/xe-390-configuration/dhcpv6_options_18_37_lrda.html
The ldra feature seems to be implemented quite similarly over all switches
running IOS XE.
So there is no switch ip to extract. Also both isc dhcp and the new kea would
not be able to match the requests with more than one criteria
With other dslam/switches we can configure specific strings as interface-id or
remote-id and match them as follows
host foo {
host-identifier v6relopt 1 dhcp6.interface-id "customer-lineid-12345";
fixed-prefix6 2001:db8:cafe:1200::/56;
}
We need to identfiy lines in the dhcp for two use cases:
1. assignment of static prefixes
2. logging of assignments to customers
Apprently there are some new commands in IOS 3.9 that I will need to test
tomorrow.
Still hoping per interface user configurable interface-id or remote-id will be
available on the platform soon.
Greetings
Christian
kind regards
Pshem
On Wed, 31 May 2017 at 23:43 Christian Kratzer <ck-li...@cksoft.de> wrote:
Hi,
I have multiple c4506 with 80 port linecards in a dhcp based point to
point ftth deployment.
We already use dhcp option82 circuit-id for identifying customer ipv4
assignments in the dhcp server.
ip dhcp snooping vlan 10 information option format-type circuit-id
override string <ourlineid>
This is good as it allows us to provision our lineid to be used for the
circuit-id value.
For ipv6 I was intending to use dhcpv6 options 18 or 37 for interface-id
or remote-id.
Sadly both seem to provide non user configurable values that are only
unique in context of the router in question.
Option18 provides us with: Gi2/3
Option37 provides binary data that does also not inlucude a hostname.
Gi2/3 is of course not unique in a network of more than one switch.
It seems to be the whole feature is utterly useless. I have also not
found a single cisco platform that would provide user configurable ipv6
opt18 or 37.
Is a feature like this somewhere on the roadmaps for the c4506 platform ?
Greetings
Christian
--
Christian Kratzer CK Software GmbH
Email: c...@cksoft.de Wildberger Weg 24/2
Phone: +49 7032 893 997 <+49%207032%20893997> - 0 D-71126
Gaeufelden
Fax: +49 7032 893 997 <+49%207032%20893997> - 9 HRB 245288,
Amtsgericht Stuttgart
Mobile: +49 171 1947 843 <+49%20171%201947843>
Geschaeftsfuehrer: Christian Kratzer
Web: http://www.cksoft.de/
_______________________________________________
cisco-nsp mailing list cisco-nsp@puck.nether.net
https://puck.nether.net/mailman/listinfo/cisco-nsp
archive at http://puck.nether.net/pipermail/cisco-nsp/
--
Christian Kratzer CK Software GmbH
Email: c...@cksoft.de Wildberger Weg 24/2
Phone: +49 7032 893 997 - 0 D-71126 Gaeufelden
Fax: +49 7032 893 997 - 9 HRB 245288, Amtsgericht Stuttgart
Mobile: +49 171 1947 843 Geschaeftsfuehrer: Christian Kratzer
Web: http://www.cksoft.de/
_______________________________________________
cisco-nsp mailing list cisco-nsp@puck.nether.net
https://puck.nether.net/mailman/listinfo/cisco-nsp
archive at http://puck.nether.net/pipermail/cisco-nsp/
