Yes they are (well VLAN interfaces on the same Physical interface anyway).

Thanks David/Lonnie for the info here. It seems to be exactly what I am looking 
for.
I will let you know how I go.

Regards
Michael Knill

From: David Kerr <[email protected]>
Reply to: AstLinux List <[email protected]>
Date: Thursday, 15 October 2020 at 8:45 am
To: AstLinux List <[email protected]>
Subject: Re: [Astlinux-users] Secondary IP Address

Are the two subnets connected to two different LAN interfaces on Astlinux?  If 
so look at the avahi service and in avahi-daemon.conf add this...

[reflector]
enable-reflector=yes
reflect-ipv=no
#reflect-filters=_printer._tcp.local,_ipp._tcp.local,_pdl-datastream._tcp.local,_airplay._tcp.local,_raop._tcp.local,_googlecast._tcp.local,_googlerpc._tcp.local,_googlezone._tcp.local,_hap._tcp.local,_appletv-v2._tcp.local,_homekit._tcp.local

I have commented out the reflect-filter line above which means "reflect" all 
bonjour traffic across interfaces, if you uncomment then only those listed 
services will be reflected between LANs... above I have a typical set.

You can view what services are broadcast on your LANs with the "Discovery" app 
available in both the iOS and MacOS app stores (I don't know about Android but 
presume there is a version for that too).  Beware that clients cache what they 
find so enabling/disabling or changing the reflect-filter in avahi does not 
necessarily get immediately picked up by the clients.

And... if you want a client on one LAN to talk to a printer on another LAN then 
firewall rules need to permit the traffic.

David



On Wed, Oct 14, 2020 at 5:11 PM Michael Knill 
<[email protected]<mailto:[email protected]>> 
wrote:
Would it be worth turning on UPnP do you think?

Regards
Michael Knill

On 15/10/20, 8:08 am, "Michael Knill" 
<[email protected]<mailto:[email protected]>> 
wrote:

    Hi Guys

    It seems that this was working fine when the Cisco router was in place and 
only stopped when the Astlinux box was put in place.
    Looking at the Cisco router I do see 'ip forward-protocol nd' with nd being 
the Neighbor Discovery Protocol which may have been the reason it worked.
    Is it possible to set this up on Astlinux?

    Regards
    Michael Knill

    On 14/10/20, 7:34 am, "Michael Knill" 
<[email protected]<mailto:[email protected]>> 
wrote:

        Hi Lonnie. Good question.

        I have a site with two customers sharing the same network and telephony 
infrastructure.
        The data network is segregated for the two customers but there is a 
single shared printer on one of the networks.
        The customer on the other network is having problems with the printer 
and their current IT provider has said that because the driver is so crap, the 
printer needs to be on the same network (Sigh!)
        Also this network has a number of statically assigned devices.

        I must admit that as I write this, I'm not sure this is going to solve 
the problem. So ridiculous!

        Thanks guys though for the info.

        Regards
        Michael Knill

        On 14/10/20, 12:22 am, "Lonnie Abelbeck" 
<[email protected]<mailto:[email protected]>> wrote:

            A question to Michael Knill, can you help us understand why you 
want to add an additional IP to a LAN ?

            A comment, when adding network commands to rc.elocal, it is best to 
use 'ip' (iproute2) instead of 'ifconfig' (busybox).

            So, if for some reason you want to add 
192.168.99.1/32<http://192.168.99.1/32> to eth1, simply:
            --
            ip addr add 192.168.99.1/32<http://192.168.99.1/32> dev eth1
            --

            If for some reason you want it to look like an old-style ifconfig 
'alias' with label 'eth1:1', add the label:
            --
            ip addr add 192.168.99.1/32<http://192.168.99.1/32> dev eth1 label 
eth1:1
            --

            Lonnie




            > On Oct 13, 2020, at 3:03 AM, Michael Keuter 
<[email protected]<mailto:[email protected]>> wrote:
            >
            >
            >
            >> Am 13.10.2020 um 06:16 schrieb Michael Knill 
<[email protected]<mailto:[email protected]>>:
            >>
            >> Hi Group
            >>
            >> Is there a way to add a secondary LAN IP Address with Astlinux?
            >> I cant see an INTIP_ALIAS variable!
            >>
            >> Regards
            >> Michael Knill
            >
            > 
https://www.cyberciti.biz/faq/linux-creating-or-adding-new-network-alias-to-a-network-card-nic/
            >
            > You have to add this to rc.elocal to make it persistent.
            >
            > Michael
            >
            > http://www.mksolutions.info
            >
            >
            >
            >
            >
            > _______________________________________________
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to [email protected]<mailto:[email protected]>.
            >
            >



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