Hi,
at moment, we got the UTM 9.355 and want to use IPv6. We receive Router Advertisements like this one below and i need some help understand them. As far as our Carrier told us, we have to manually set the WAN-side IPv6 for our WAN-Interface (which itself is LAG1 - an LACP Trunk) but we have to use the IPv6 Gateway sent us via those RA's since there are 2 routers which can change (HA Routers).
Also we should have a /64 Prefix routed towards us which is not sent via RA (no delegated prefix). So i assume, we just could use this Prefix internally since they said it's routed to us.
The RA which we receive does look like this (but i changed the address slightly for security reasons):
Wireshark-Output of the RA:
Frame 1697: 142 bytes on wire (1136 bits), 142 bytes captured (1136 bits)
Ethernet II, Src: BrocadeC_02:dc:00 (00:1b:ed:02:dc:00), Dst: IPv6mcast_01 (33:33:00:00:00:01)
Internet Protocol Version 6, Src: fe80::21b:edff:fe02:dc00, Dst: ff02::1
0110 .... = Version: 6
.... 1100 0000 .... .... .... .... .... = Traffic class: 0xc0 (DSCP: CS6, ECN: Not-ECT)
.... .... .... 0000 0000 0000 0000 0000 = Flowlabel: 0x00000000
Payload length: 88
Next header: ICMPv6 (58)
Hop limit: 255
Source: fe80::21b:edff:fe02:dc00
[Source SA MAC: BrocadeC_02:dc:00 (00:1b:ed:02:dc:00)]
Destination: ff02::1
[Source GeoIP: Unknown]
[Destination GeoIP: Unknown]
Internet Control Message Protocol v6
Type: Router Advertisement (134)
Code: 0
Checksum: 0x7bd2 [correct]
Cur hop limit: 64
Flags: 0x00
0... .... = Managed address configuration: Not set
.0.. .... = Other configuration: Not set
..0. .... = Home Agent: Not set
...0 0... = Prf (Default Router Preference): Medium (0)
.... .0.. = Proxy: Not set
.... ..0. = Reserved: 0
Router lifetime (s): 120
Reachable time (ms): 0
Retrans timer (ms): 0
ICMPv6 Option (Source link-layer address : 00:1b:ed:02:dc:00)
Type: Source link-layer address (1)
Length: 1 (8 bytes)
Link-layer address: BrocadeC_02:dc:00 (00:1b:ed:02:dc:00)
ICMPv6 Option (Prefix information : 2a00:cd1:1325:765::/124)
Type: Prefix information (3)
Length: 4 (32 bytes)
Prefix Length: 124
Flag: 0xc0
1... .... = On-link flag(L): Set
.1.. .... = Autonomous address-configuration flag(A): Set
..0. .... = Router address flag(R): Not set
...0 0000 = Reserved: 0
Valid Lifetime: 2592000
Preferred Lifetime: 604800
Reserved
Prefix: 2a00:cd1:1325:765::
ICMPv6 Option (Prefix information : 2a00:cd1:1325:765::/124)
Type: Prefix information (3)
Length: 4 (32 bytes)
Prefix Length: 124
Flag: 0xc0
1... .... = On-link flag(L): Set
.1.. .... = Autonomous address-configuration flag(A): Set
..0. .... = Router address flag(R): Not set
...0 0000 = Reserved: 0
Valid Lifetime: 2592000
Preferred Lifetime: 604800
Reserved
Prefix: 2a00:cd1:1325:765::
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