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eir FTTH & IP addresses

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    #32
    Packet
    Registered Users Posts: 188 ✭✭Packet


    Normally only one IPv4 address (plus on FTTH/VDSL2, when requested by the router, one IPv6 delegated prefix) is dynamically assigned per connection.

    If every connection received separate requests for two IPv4 addresses the pools would run out of addresses but in practice that doesn't happen. In the network there is a higher limit (which has been applied in recent years to avoid problems such as that) on how many addresses and prefixes may be requested per connection. Since most people don't have set-ups requesting multiple IPv4 addresses overall the utilisation impact on the pools of requests for more than one IPv4 address is small.

    With FTTH/VDSL2 the default is IPoE/DHCP but if a PPPoE IPCP request or two of the same kind of request is made both requests arrive at the same node and routing for both is the same. In the case of ADSL, connections are either mapped to a BRAS or lately one of the same nodes FTTH/VDSL2 connects to. Never both at the same time. So multiple address assignments always come from the same pool and the routing for them through the network is the same.


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    #33
    frozenfrozen
    Registered Users Posts: 7,882 ✭✭✭frozenfrozen


    Is this still possible to get a second public ip on Eir FTTH? Sorry for bump. I think this will be the answer to an issue I've been having for months caused by symmetric vs full cone nat and WebRTC



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