07-03-2020 03:28 AM
Hi,
I'm trying to setup a cellular connection on my Cisco 1111 router.
The interface is UP and it gets a private IPv4 and a public IPv6 address.
If I try to send something on IPv4 through the cellular interface it works fine.
But there seems to be an issue with the IPv6.
I setup IPv6 routes (and a default route) but it doesn't seem to be working.
From various configuration guides I see the command ipv6 address autoconfig but it seems it is not supported here.
RTR(config-if)#ipv6 address autoconfig
IPv6 autoconfig is not supported on interface Cellular0/2/0!
Enabling IPv6 now!
But as I said I can see that the router gets an IPv6 address.
ATN-L3-RTR-21#sh ipv6 interface Cellular0/2/0 is up, line protocol is up IPv6 is enabled, link-local address is FE80::AAAA:6666:FFFF:580 (Note:sanitized) No Virtual link-local address(es): Global unicast address(es): 2001:XXXX:YYYY:ZZZZ:AAAA:B90A:FA05:4726, subnet is 2001:XXXX:YYYY:ZZZZ::/64 (Note:sanitized) Joined group address(es): FF02::1 FF02::1:FF05:4726 FF02::1:FF43:580 MTU is 1500 bytes ICMP error messages limited to one every 100 milliseconds ICMP redirects are enabled ICMP unreachables are sent Output features: Dialer idle reset ND DAD is enabled, number of DAD attempts: 1 ND reachable time is 30000 milliseconds (using 30000) ND NS retransmit interval is 1000 milliseconds
Here is my config:
controller Cellular 0/2/0 lte modem link-recovery rssi onset-threshold -110 lte modem link-recovery monitor-timer 20 lte modem link-recovery wait-timer 10 lte modem link-recovery debounce-count 6 lte modem crash-action boot-and-hold interface Cellular0/2/0 ip address negotiated dialer in-band dialer idle-timeout 0 dialer-group 1 ipv6 enable pulse-time 1 ip virtual-reassembly access-list 1 permit any dialer-list 1 protocol ip permit dialer-list 1 protocol ipv6 permit ipv6 route 2600::/16 Cellular0/2/0 ipv6 route ::/0 Cellular0/2/0
When I try to ping for instance 2600:: it does not work.
Any idea what I'm doing wrong?
Thank you in advance!
07-09-2020 01:45 AM
I managed to fix this.
In case someone bumps into this in the future the solution is to add the command ipv6 unicast-routing in global config.
After that IPv6 started to work and I was able to access external IPv6 addresses.
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