Small cisco boxes doing IPv6?

[Michael Adams]

Am 13.02.2012 11:36, schrieb Marco Hogewoning:
> If it is of any help, we now have two models running 2921 and 1921 and both the systems were delivered on 15.1(4)M3, which is from december 2011,  IPbase and K9 license on the box. I ran a couple of quick tests and confirmed IPv6 functionality on BGP, OSPF and IS-IS. These were no performance tests, but at least I verified the process starts and is capable of exchanging a static IPv6 route. Little disclaimer: this was the first time I ever touched IS-IS, your mileage may vary.

I did some performance tests on a 1921 with 15.1(2)T4 / security license and
experienced a serious degradation when using PPPoE uplinks.

v6
 unidirectional IMIX UDP packets, G0/0 -> G0/1 : 100 Mbit/s @ 20 % CPU
 unidirectional IMIX UDP packets, G0/0 -> G0/1 (PPPoE): 50 Mbit/s @ 72 % CPU

v4
 unidirectional IMIX UDP packets, G0/0 -> G0/1 : 100 Mbit/s @ 14 % CPU
 unidirectional IMIX UDP packets, G0/0 -> G0/1 (PPPoE): 100 Mbit/s @ 26 % CPU

For me it looks like the box has some problems with IPv6 together with PPP. It may also
be a configration issue. So here is a part of the config. The box was not doing NAT or
ipv6 inspect.

no ipv6 source-route
ipv6 unicast-routing
ipv6 cef
no ip source-route
ip cef
!
interface GigabitEthernet0/0
 description traffic generator
 ip address x.x.x.x 255.255.255.0
 no ip redirects
 load-interval 30
 duplex auto
 speed auto
 ipv6 address 2001:db8::1/64
 ipv6 enable
 no ipv6 redirects
 ipv6 verify unicast reverse-path
!
interface GigabitEthernet0/1
 description Uplink
 no ip address
 load-interval 30
 duplex auto
 speed auto
 pppoe enable group global
 pppoe-client dial-pool-number 1
 no cdp enable
!
interface Dialer1
 mtu 1492
 ip address negotiated
 encapsulation ppp
 dialer pool 1
 dialer-group 1
 ipv6 address FE80::CE link-local
 ipv6 address autoconfig
 ipv6 enable
 ppp authentication pap callin
 ppp pap sent-username <its-me> password <its-really-me>
 no cdp enable
!
ipv6 route ::/0 Dialer1
ip route 0.0.0.0 0.0.0.0 Dialer1


Hints welcome.

Michael