frnkblk at iname
Apr 7, 2011, 10:37 PM
Post #3 of 3
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Mark:
Yes, I'm running stateful DCHPv6. But I didn't think of PCs that might
directly attach, so stateless DHCPv6 support is a good idea.
Frank
-----Original Message-----
From: ipv6-ops-bounces+frnkblk=iname.com [at] lists
[mailto:ipv6-ops-bounces+frnkblk=iname.com [at] lists] On Behalf Of
Mark Smith
Sent: Thursday, April 07, 2011 5:49 PM
To: frnkblk [at] iname
Cc: ipv6-ops [at] lists
Subject: Re: Configuring Cisco 7206VXR as BRAS
Hi Frank,
On Thu, 7 Apr 2011 17:31:16 -0500
"Frank Bulk" <frnkblk [at] iname> wrote:
> My previous PPPoE testing used the 5th Ethernet port on the DSL modems.
Two
> of the three vendors I've been working with gave me firmware updates
within
> the last week and I moved testing from PPPoE over Ethernet against a test
> 7206VXR to our production DSLAM with our production 7206VXR.
>
> I got all three working pretty well (the status page in their GUI is
lacking
> in the products) and they appeared to handle /56 delegated prefix OK.
>
> In reviewing my configuration, I ended removing three commands on my
> Virtual-Template:
> ipv6 address autoconfig
> peer default ipv6 pool ipv6pool-lns
> ipv6 nd other-config-flag
>
> The first doesn't seem necessary and all it did was add another IPv6
address
> to the WAN interface of the DSL modem. The second isn't necessary because
I
> use DHCPv6 relay, and the third I changed to "ipv6 nd
managed-config-flag".
>
Regarding "ipv6 nd other-config-flag", are you using stateful DHCPv6
for addressing or SLAAC for the downstream devices? If it's SLAAC, then
I'd leave "ipv6 nd other-config-flag", on the chance that PCs or
non-CPE/router devices will be used as direct PPPoE clients, and want to
acquire other IPv6 parameters via stateless DHCPv6. The "ipv6 nd
managed-config-flag" would force those PCs to try to use stateful
DHCPv6 to acquire addresses (inherently getting other IPv6 parameters as
well), and would cause that to fail if they don't have a stateful
DHCPv6 client.
>
> This is my current configuration:
>
> interface Virtual-Template1
> mtu 1492
> ip unnumbered Loopback11
> ip access-group 125 in
> ip verify unicast source reachable-via rx 126
> ip mtu 1492
> ip tcp adjust-mss 1452
> no logging event link-status
> peer default ip address dhcp
> ipv6 unnumbered Loopback11
> ipv6 enable
> no ipv6 nd suppress-ra
> ipv6 nd managed-config-flag
> ipv6 dhcp relay destination DEAD:BEEF:0:1000::7
> ppp mtu adaptive
> ppp authentication pap radius-group-aaa
> ppp ipcp dns <IPv4 addresses>
> ppp ipcp address unique
> end
>
> interface Loopback11
> <snip IPv4 addresses>
> ip route-cache same-interface
> ipv6 address DEAD:BEEF:4000::1/64
> ipv6 enable
> end
>
>
> Any recommendations for improvement or advice?
>
> Frank
>
Regards,
Mark.
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