Multiple gateways one ip range

[eliot]

i would replace the isp provided router with your own firewall, they all usually allow two wan connections - mainly in a backup configuration. True bonding of connections needs extra hardware typically located in an isp. Simple load balancing can work, but your public ip will keep changing all the time and sessions might drop because the app things you have changed connection (which you have)

[davidd]

Lots of good info here, thanks.

I'm going to bung a few static ip's on things and run them through the 5g router, me, the TV and sky box mainly.

So my next question is...

I'm, happy with IP{v4 ad can easily sort the static stuff out. v6 though, that is a mystery.
I can find the ip address easily enough with an ipconfig /all, how can I find the gateway?

Thanks

D

[edeath]

ffc said:

Hosts will find each other by using the Address Resolution Protocol (ARP) to ask for the MAC address of the destination device. If they are on the same subnet and physically connected the receiving device will answer with its own MAC address and the routers won't get involved. If the destination IP address is not in the local subnet the transmitting host will make an ARP request for its configured gateway address and forward packets to that for onward transmission.

Having two routers on the same subnet is a fairly common occurrence outside a domestic environment.

If you load wireshark onto your PC and have a few devices on your network you can capture ARP activity and see how the process works.

Thanks, was vaguely aware of ARP but not how it works.

[ffc]

davidd said:

Lots of good info here, thanks.

I'm going to bung a few static ip's on things and run them through the 5g router, me, the TV and sky box mainly.

So my next question is...

I'm, happy with IP{v4 ad can easily sort the static stuff out. v6 though, that is a mystery.
I can find the ip address easily enough with an ipconfig /all, how can I find the gateway?

Thanks

D

How are your hosts getting IPv6 addresses? v6 uses neighbor discovery (apologies for the American spelling but they wrote the rfc) which is more comprehensive than arp. A simplish explanation is here https://sites.google.com/site/amitsciscozone/ipv6/... or if you have insomnia the current rfc for IPv6 ND is rfc4681.

[eliot]

Not often you hear domestic users talking about ipv6 - does your isp even support it?

[davidd]

eliot said:

Not often you hear domestic users talking about ipv6 - does your isp even support it?

The isps router gives ipv6 on dhcp, they also show ipv6 on whatsmyip…. So I suspect they support it but who knows.

You could just tell me how to get the value for the gateway….

Edited by davidd on Thursday 23 May 22:21

[wombleh]

“Route print -6” in a command prompt might do it

[eeLee]

davidd said:

So my next question is...

I'm, happy with IP{v4 ad can easily sort the static stuff out. v6 though, that is a mystery.
I can find the ip address easily enough with an ipconfig /all, how can I find the gateway?

If you don't need it, I would not do it. Your NAT solution will handle everything for you.

[davidd]

eeLee said:

If you don't need it, I would not do it. Your NAT solution will handle everything for you.

What ipv6? so just run ipv4 internally?

[davidd]

wombleh said:

“Route print -6” in a command prompt might do it

Thanks got it, then spotted it on ipconfig /all I'm sure it wasn't there the other day

[xeny]

davidd said:

What ipv6? so just run ipv4 internally?

Unless you know more than your initial question would suggest, I'd argue deliberately trying to run v6 internally is a poor use of your time/brain space. You are unlikely to run out of IPV4 addresses in the typical domestic residence.

[davidd]

xeny said:

Unless you know more than your initial question would suggest, I'd argue deliberately trying to run v6 internally is a poor use of your time/brain space. You are unlikely to run out of IPV4 addresses in the typical domestic residence.

A very fair point. It is 30 years since I've done any proper networking so wasn't sure if there were any ramifications of not running it of the routers were dishing it out over dhcp.

I'll kill it.

Thanks folks, appreciate your help.

[ffc]

eliot said:

Not often you hear domestic users talking about ipv6 - does your isp even support it?

I have it configured here but that's more for work experimentation. IME Smaller ISP's have OK support for it, while bigger ISP's a patchy. Virgin media don't support it on cable while Vodafone do.

[ffc]

davidd said:

The isps router gives ipv6 on dhcp, they also show ipv6 on whatsmyip…. So I suspect they support it but who knows.

You could just tell me how to get the value for the gateway….

Edited by davidd on Thursday 23 May 22:21

As above IPv6 uses neighbor discovery to tell you what the gateway is. https://en.wikipedia.org/wiki/Neighbor_Discovery_P...