IPv6 address with USB LTE Pantech UML295

mdaitc · Thu Apr 02, 2015 4:43 am

Hi,

i'm wanting to try and figure out why I dont get a global IPv6 address when connecting a USB LTE device to my x86 device (RouterOS 6.27). It appears as a USB Ethernet adapter - in Linux it uses the cdc_ether driver

When connecting to Mac OSX, the following occurs:

en7: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
	ether d0:95:c7:36:1a:64
	inet6 fe80::d295:c7ff:fe36:1a64%en7 prefixlen 64 scopeid 0x10
	inet 192.168.32.50 netmask 0xffffff00 broadcast 192.168.32.255
	inet6 2600:100a:b128:ddd:d295:c7ff:fe36:1a64 prefixlen 64 autoconf
	inet6 2600:100a:b128:ddd:a8a5:1236:6c5f:86f2 prefixlen 64 autoconf temporary
	nd6 options=1<PERFORMNUD>
	media: autoselect (100baseTX <full-duplex>)
	status: active

When connecting to the RouterOS system, i get the following:

[admin@alix] /ipv6 address> print
Flags: X - disabled, I - invalid, D - dynamic, G - global, L - link-local
 #    ADDRESS                                     FROM-POOL INTERFACE                                                                                   ADVERTISE
 0 DL fe80::20d:b9ff:fe13:9c34/64                           ether1                                                                                      no
 1 DL fe80::d295:c7ff:fe36:1a64/64                          lte1                                                                                        no

Note how the global 2600:100a::/64 addresses are not present on the RouterOS system. These are dynamically assigned by the ISP (verizon), so i can't statically make one up.

Just wondered if anyone has any ideas - i'm wanting to use this system as an IPv6 router (or NAT? if necessary) without doing any tunneling to HE or similar.

Thu Apr 02, 2015 5:15 am

The LTE service supports IPv6.
Your MAC uses SLAAC (stateless autoconfig) to get its address and default GW from the LTE service.

Mikrotik, however, does not support receiving an IPv6 address / gateway from SLAAC.

You could try putting dhcpv6-client on the LTE interface, and assigning the results to a pool called LTE
Then on interface LAN (you actually don't need one on the WAN interface - isn't that neat?) assign this IPv6:
::1/64 from-pool=LTE

mdaitc · Thu Apr 02, 2015 5:56 am

The LTE service supports IPv6.
Your MAC uses SLAAC (stateless autoconfig) to get its address and default GW from the LTE service.

Mikrotik, however, does not support receiving an IPv6 address / gateway from SLAAC.

You could try putting dhcpv6-client on the LTE interface, and assigning the results to a pool called LTE
Then on interface LAN (you actually don't need one on the WAN interface - isn't that neat?) assign this IPv6:
::1/64 from-pool=LTE

Alas, I don't think the LTE device supports DHCP - i'm not seeing any response packets from it (i have firewall logging all IPv6 traffic).

I understand that SLAAC isn't technically for routers according to the RFCs, but i'd hate to just install a linux box to act as the router (and it get an address via SLAAC)...

Thu Apr 02, 2015 6:19 am

Alas, I don't think the LTE device supports DHCP - i'm not seeing any response packets from it (i have firewall logging all IPv6 traffic).

I understand that SLAAC isn't technically for routers according to the RFCs, but i'd hate to just install a linux box to act as the router (and it get an address via SLAAC)...

I made a feature request for this.
All the major vendors' routers can use SLAAC to learn an interface's ip6 address.
Mikrotik should too.

mdaitc · Thu Apr 02, 2015 11:50 pm

Alas, I don't think the LTE device supports DHCP - i'm not seeing any response packets from it (i have firewall logging all IPv6 traffic).

I understand that SLAAC isn't technically for routers according to the RFCs, but i'd hate to just install a linux box to act as the router (and it get an address via SLAAC)...
I made a feature request for this.
All the major vendors' routers can use SLAAC to learn an interface's ip6 address.
Mikrotik should too.

i've submitted this as a feature request also. hopefully with enough voices.....

IPv6 address with USB LTE Pantech UML295

IPv6 address with USB LTE Pantech UML295

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