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Dual-stack PPPoE on ios xe


Right now i'm using ASR1k as PPPoE concentrator for my clients. It's ipv4 only PPPoE sessions and I want to modify it, so it will be dual-stack ipv4/ipv6 sessions. So far I was able to issue /64 prefix for every session via dhcpv6 but the problem is that for ipv6 connectivity ASR must create additional route for every session that points /64 ipv6 subnet to correlating virtual interface. As far as I know command ipv6 dhcp iana-route-add responsible for this, but even if it's issued ASR does not create routes. Is there any workaround or am I doing something wrong? Creating two different sessions for ipv4 and ipv6 was already considered and it's not an option.

I'm runing ios xe 03.07.02.S

For reference:

interface Virtual-Template1

ip unnumbered TenGigabitEthernet0/2/0

ip access-group test-net in

ip access-group test-net out

no ip proxy-arp

no logging event link-status

ipv6 unnumbered TenGigabitEthernet0/2/0

ipv6 enable

ipv6 nd prefix default 259200 86400 no-autoconfig

ipv6 nd managed-config-flag

ipv6 nd other-config-flag

no ipv6 nd ra suppress

ipv6 dhcp server ipv6-customers-dhcp

peer ip address forced

peer default ip address pool tPPPoE

peer default ipv6 pool ipv6-customers

keepalive 30

ppp authentication chap

ppp ipcp dns

ppp ipcp address unique

ppp timeout idle 300


ipv6 unicast-routing

ipv6 dhcp iana-route-add

ipv6 dhcp pool ipv6-customers-dhcp

prefix-delegation pool ipv6-customers

address prefix 2001:67C:1584:8FFF::/64

dns-server 2001:67C:1584:60::7

accounting default


Cisco Employee

Dual-stack PPPoE on ios xe

Hi Artyom,

Try removing "ipv6 nd managed-config-flag" and see if it helps.


Harold Ritter
Sr. Technical Leader
CCIE 4168 (R&S, SP)
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