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ICMPv6 settings for fastDPI
The following ICMPv6 Router Solicication/Advertisement processing parameters can be set in fastdpi.conf; most of these parameters are defined in RFC 4861:
| Parameter | Format | Default Value | Description |
|---|---|---|---|
| bras_ipv6_router_pref | number | 0 | BNG mode and priorities as IPv6 router: -1 - BNG is not an IPv6 router, it does not process ICMPv6 Router Solicitation and does not send Router Advertisement; 0 - BNG is an IPv6 router with Medium priority; 1 - BNG is an IPv6 router with High priority; 3 - BNG is an IPv6 router with Low priority |
| bras_icmp6_rtradv_mtu | number | 1500 | The MTU specified in the Router Advertisement. Value 0 - do not add MTU option to Router Advertisement |
| bras_icmp6_reachable_time | number | 0 | AdvRetransTimer, milliseconds. Used by IPv6 clients - the time between retransmission of Neighbor Solicitation messages. 0 - not set by the router |
| bras_icmp6_hop_limit | number | 64 | AdvCurHopLimit the value of the Hop Limit field of IPv6 packets |
| bras_icmp6_default_lifetime | number | 1800 | AdvDefaultLifetime, seconds. Used by IPv6 clients to build a list of default routers. A 0 value indicates that BNG is not the default router. |
Unsolicited RA
Since Stingray SG in L2 BNG mode is an IPv6 router, according to RFC 4861 it periodically announces itself to the local network with ICMPv6 Router Advertisement (unsolicited RA) message.
| Parameter | Format | Default value | Description |
|---|---|---|---|
| bras_icmp6_send_rtradv | number | 0 | Send (1) or not (0) the periodic RA |
| bras_icmp6_min_rtradv_interval | number | 200 | Initial boundary of periodic RA sending interval, seconds |
| bras_icmp6_max_rtradv_interval | number | 600 | Ending boundary of periodic RA sending interval, seconds |
When the unsolicited RA sending mode is enabled, the time of the next RA sending is randomly selected from the interval [bras_icmp6_min_rtradv_interval, bras_icmp6_max_rtradv_interval] for each active DHCPv6 subscriber.