IPv6 Stateless Configuration
Hi, First time poster here. I would just like to ask what are the flags on router advertisement to enable a host to autoconfigure its IPv6 address. There is this device that I'm configuring that I cant get RA to work. I was able to work out the connectivity from the device to the IPv6 internet, but the problem is host behind this device is not getting its unique global ipv6 address. The device is a cyberoam UTM. Thanks! Rod Bio.
You need all to be part of the same Ethernet network. So if this UTM can act as a bridge/switch you should be ok. Otherwise the RA broadcasts need to reach your device so it guesses the network and add it's Mac address to the network and make an ipv6 address. I would say RA is a bit like DHCP in your case in terms of network topology but beside that RA is simpler (no leases table). Toute connaissance est une réponse à une question On 15/10/2010, at 17:49, Rod James Bio <rjubio@gmail.com> wrote:
Hi,
First time poster here. I would just like to ask what are the flags on router advertisement to enable a host to autoconfigure its IPv6 address. There is this device that I'm configuring that I cant get RA to work. I was able to work out the connectivity from the device to the IPv6 internet, but the problem is host behind this device is not getting its unique global ipv6 address. The device is a cyberoam UTM.
Thanks! Rod Bio.
That's my setup right now. The problem is the machine is not configuring its IPv6 address with RA already turned on. I'm guessing that the flag set on the UTM router advertisement messages is wrong. May I know the default flags use on a cisco router? Thanks. On Fri, Oct 15, 2010 at 3:04 PM, Franck Martin <franck@genius.com> wrote:
You need all to be part of the same Ethernet network. So if this UTM can act as a bridge/switch you should be ok. Otherwise the RA broadcasts need to reach your device so it guesses the network and add it's Mac address to the network and make an ipv6 address.
I would say RA is a bit like DHCP in your case in terms of network topology but beside that RA is simpler (no leases table).
Toute connaissance est une réponse à une question
On 15/10/2010, at 17:49, Rod James Bio <rjubio@gmail.com> wrote:
Hi,
First time poster here. I would just like to ask what are the flags on router advertisement to enable a host to autoconfigure its IPv6 address. There is this device that I'm configuring that I cant get RA to work. I was able to work out the connectivity from the device to the IPv6 internet, but the problem is host behind this device is not getting its unique global ipv6 address. The device is a cyberoam UTM.
Thanks! Rod Bio.
On Fri, 15 Oct 2010, Rod James Bio wrote:
That's my setup right now. The problem is the machine is not configuring its IPv6 address with RA already turned on. I'm guessing that the flag set on the UTM router advertisement messages is wrong. May I know the default flags use on a cisco router? Thanks.
The default is that M and O bits are off, ie hosts should do SLAAC and there is no DHCPv6 info to be had. -- Mikael Abrahamsson email: swmike@swm.pp.se
Got it now. The preferredlifetime should be less than the value of the validlifetime option. Thanks BTW! :D On Fri, Oct 15, 2010 at 3:19 PM, Mikael Abrahamsson <swmike@swm.pp.se>wrote:
On Fri, 15 Oct 2010, Rod James Bio wrote:
That's my setup right now. The problem is the machine is not configuring
its IPv6 address with RA already turned on. I'm guessing that the flag set on the UTM router advertisement messages is wrong. May I know the default flags use on a cisco router? Thanks.
The default is that M and O bits are off, ie hosts should do SLAAC and there is no DHCPv6 info to be had.
-- Mikael Abrahamsson email: swmike@swm.pp.se
I have seen layer 2 devices not forwarding IPv6 packets (while forwarding IPv4 packets)... I would put a packet capture, and see if I see the RA packets coming from the router. On a Cisco router, RA is enabled by default and does not require any setting. ----- Original Message ----- From: "Rod James Bio" <rjubio@gmail.com> To: "Franck Martin" <franck@genius.com> Cc: nanog@nanog.org Sent: Friday, 15 October, 2010 7:11:07 PM Subject: Re: IPv6 Stateless Configuration That's my setup right now. The problem is the machine is not configuring its IPv6 address with RA already turned on. I'm guessing that the flag set on the UTM router advertisement messages is wrong. May I know the default flags use on a cisco router? Thanks. On Fri, Oct 15, 2010 at 3:04 PM, Franck Martin < franck@genius.com > wrote: You need all to be part of the same Ethernet network. So if this UTM can act as a bridge/switch you should be ok. Otherwise the RA broadcasts need to reach your device so it guesses the network and add it's Mac address to the network and make an ipv6 address. I would say RA is a bit like DHCP in your case in terms of network topology but beside that RA is simpler (no leases table). Toute connaissance est une réponse à une question On 15/10/2010, at 17:49, Rod James Bio < rjubio@gmail.com > wrote:
Hi,
First time poster here. I would just like to ask what are the flags on router advertisement to enable a host to autoconfigure its IPv6 address. There is this device that I'm configuring that I cant get RA to work. I was able to work out the connectivity from the device to the IPv6 internet, but the problem is host behind this device is not getting its unique global ipv6 address. The device is a cyberoam UTM.
Thanks! Rod Bio.
Pay attention to the special layer 2 multicast address for the RA packet. On 10/15/10 3:21 PM, "Franck Martin" <franck@genius.com> wrote:
I have seen layer 2 devices not forwarding IPv6 packets (while forwarding IPv4 packets)...
I would put a packet capture, and see if I see the RA packets coming from the router.
On a Cisco router, RA is enabled by default and does not require any setting.
----- Original Message ----- From: "Rod James Bio" <rjubio@gmail.com> To: "Franck Martin" <franck@genius.com> Cc: nanog@nanog.org Sent: Friday, 15 October, 2010 7:11:07 PM Subject: Re: IPv6 Stateless Configuration
That's my setup right now. The problem is the machine is not configuring its IPv6 address with RA already turned on. I'm guessing that the flag set on the UTM router advertisement messages is wrong. May I know the default flags use on a cisco router? Thanks.
On Fri, Oct 15, 2010 at 3:04 PM, Franck Martin < franck@genius.com > wrote:
You need all to be part of the same Ethernet network. So if this UTM can act as a bridge/switch you should be ok. Otherwise the RA broadcasts need to reach your device so it guesses the network and add it's Mac address to the network and make an ipv6 address.
I would say RA is a bit like DHCP in your case in terms of network topology but beside that RA is simpler (no leases table).
Toute connaissance est une réponse à une question
On 15/10/2010, at 17:49, Rod James Bio < rjubio@gmail.com > wrote:
Hi,
First time poster here. I would just like to ask what are the flags on router advertisement to enable a host to autoconfigure its IPv6 address. There is this device that I'm configuring that I cant get RA to work. I was able to work out the connectivity from the device to the IPv6 internet, but the problem is host behind this device is not getting its unique global ipv6 address. The device is a cyberoam UTM.
Thanks! Rod Bio.
participants (4)
-
Franck Martin -
Mikael Abrahamsson -
Rod James Bio -
Zhao Ping