VPNMON VPNMON-R2 v2.0 -Jul 10, 2022- Monitor your VPN connection's Health (Thread locked/closed)

[Viktor Jaep]

I would guess no. Not always.

If WAN0/WAN1 don't correlate to eth0/eth1, why would that be? Do you think people are manually manipulating which eth# they're linking things to? Can you think of any instances where this is happening? Nothing to do with different router models, right?

 

[Viktor Jaep]

Luckily, there apparently is an NVRAM value for this! Thank goodness...

nvram get wan0_ifname

 

[dave14305]

Luckily, there apparently is an NVRAM value for this! Thank goodness...

nvram get wan0_ifname

This script has code to determine if dual-wan is active, which mode, and which ifname.

asuswrt-merlin.ng/release/src/router/rom/apps_scripts/getrealip.sh at master · RMerl/asuswrt-merlin.ng

Third party firmware for Asus routers (newer codebase) - RMerl/asuswrt-merlin.ng

github.com

If WAN0/WAN1 don't correlate to eth0/eth1, why would that be? Do you think people are manually manipulating which eth# they're linking things to?

As an example, the AX58U uses eth4 for wan. You never know…

 

[SomeWhereOverTheRainBow]

If WAN0/WAN1 don't correlate to eth0/eth1, why would that be? Do you think people are manually manipulating which eth# they're linking things to? Can you think of any instances where this is happening? Nothing to do with different router models, right?

try out

ip a | grep global

interesting the order things appear..... maybe make note...


also

ip a | grep global | grep -E '\b.*eth.*\b'

 

[Viktor Jaep]

This script has code to determine if dual-wan is active, which mode, and which ifname.

asuswrt-merlin.ng/release/src/router/rom/apps_scripts/getrealip.sh at master · RMerl/asuswrt-merlin.ng

Third party firmware for Asus routers (newer codebase) - RMerl/asuswrt-merlin.ng

github.com

As an example, the AX58U uses eth4 for wan. You never know…

I'm thinking, if I query "nvram get wan0_ifname", it should spit back "eth4" for example in the case of an AX58U.

On my AC86U, this line spits back "eth0"... would that logic work?

 

[chongnt]

Rhetorical question... WAN0 and WAN1 always correlate to eth0 and eth1 on our routers, right?

At least not for AC86U.

RT-AC86U Interfaces

Hi Community, I was wondering if anyone knows what the following interfaces are used for (I provided what I think they are but would like confirmation/clarification): bcmsw br0 -->Bridge interface: Does all traffic flow through this interface? eth0 -->This is for internet traffic I think...

www.snbforums.com

 

[SomeWhereOverTheRainBow]

I'm thinking, if I query "nvram get wan0_ifname", it should spit back "eth4" for example in the case of an AX58U.

On my AC86U, this line spits back "eth0"... would that logic work?

ip a | grep global | grep -oE '\beth.*\b'

what does this spit back?

or

route | grep default | grep -oE '\beth.*\b'

 

[Viktor Jaep]

ip a | grep global | grep -oE '\beth.*\b'

what does this spit back?

or

route | grep default | grep -oE '\beth.*\b'

That gives me eth0

 

[dave14305]

I'm thinking, if I query "nvram get wan0_ifname", it should spit back "eth4" for example in the case of an AX58U.

On my AC86U, this line spits back "eth0"... would that logic work?

Unless pppoe is in use. Then you need wan0_pppoe_ifname. I was surprised how complicated it can get.

 

[Viktor Jaep]

At least not for AC86U.

RT-AC86U Interfaces

Hi Community, I was wondering if anyone knows what the following interfaces are used for (I provided what I think they are but would like confirmation/clarification): bcmsw br0 -->Bridge interface: Does all traffic flow through this interface? eth0 -->This is for internet traffic I think...

www.snbforums.com

That's great info... thanks for validating that eth1 == port4

 

[SomeWhereOverTheRainBow]

That's great info... thanks for validating that eth1 == port4

isn't that dependent on the router model as well?

 

[SomeWhereOverTheRainBow]

That gives me eth0

My point is there is more than one way to awnser your question. Some of the other ways don't have the limitation of nvram variable names.


eg.

 route | grep default | awk '{ print $8 }'

 

[Viktor Jaep]

Unless pppoe is in use. Then you need wan0_pppoe_ifname. I was surprised how complicated it can get.

OMG... can't things ever be straighforward! LOL

 

[dave14305]

OMG... can't things ever be straighforward! LOL

What are you gonna do once you know the interface name?

 

[chongnt]

OMG... can't things ever be straighforward! LOL

Ppp user here

dmin@RT-AC86U-DBA8:/tmp/home/root# ip a | grep global | grep -oE '\beth.*\b'
admin@RT-AC86U-DBA8:/tmp/home/root# route | grep default | awk '{ print $8 }'
ppp0
admin@RT-AC86U-DBA8:/tmp/home/root#

 

[Viktor Jaep]

What are you gonna do once you know the interface name?

Something like this...

 

[Viktor Jaep]

Surprise, BTW! Letting the cat out of the bag here before 1.5 goes live...

 

[SomeWhereOverTheRainBow]

Ppp user here

dmin@RT-AC86U-DBA8:/tmp/home/root# ip a | grep global | grep -oE '\beth.*\b'
admin@RT-AC86U-DBA8:/tmp/home/root# route | grep default | awk '{ print $8 }'
ppp0
admin@RT-AC86U-DBA8:/tmp/home/root#

try

ip a | grep global | awk '{ print $7 }' | head -n 1

 

[Viktor Jaep]

Ppp user here

dmin@RT-AC86U-DBA8:/tmp/home/root# ip a | grep global | grep -oE '\beth.*\b'
admin@RT-AC86U-DBA8:/tmp/home/root# route | grep default | awk '{ print $8 }'
ppp0
admin@RT-AC86U-DBA8:/tmp/home/root#

I will be sure to test for this... thanks for the heads-up!

 

[Viktor Jaep]

try

ip a | grep global | awk '{ print $7 }' | head -n 1

This gives me:

eth0
br0
wl0.1
wl1.1