Basic routing issue - help needed

[[OUPA]MrNutz]

Hi MyBB people.

I need to ask for constructive views/guidance:

Smallish network.
*Router (A) -IP 172.16.1.254 <- This shall provide internet feed to 5 other smaller wifi routers , as static inputIPs. (all good)
-please note that DHCP is off (A) as there is another DHCP server running on the network for a legacy IP phone system. (no VLANS available)
*Internet is inbound received via a Telkom Metro fibre (cisco router) 196.43.x.y (B)
*Setting the static ip on the 172.16.1.254 , i receive IP flow from (B) but no DNS. (can ping internet traffic)
*i have tried the cisco router's (B) DNS , Telkom's DNS & Google DNS on the router 172.16.1.254. (A)
*Wifi client routers have DHCP going , all shall be ok once i figure out how to "forward" dns from (B) to (A)
*(B) plugs into (A) as wan port
*(A) plugs into normal switch

What am i missing? - forwarding of some sort ? Seems that router needs to forward WAN side DNS but it doesn't. Shortfall of no dhcp? Surely manually must be possible.
Yip - noob101 , alas my humble plea for assistance

 

[Hamish McPanji]

Try and draw a diagram. It might help you figure this out. And us figure out what you are talking about.

 

[syntax]

It must be late, Im not really understanding this.
But some questions anyways
1. What is the network between router A and B, since you need to default route from A to B, is that setup?
2. Where are you testing ping from? There shouldnt be anything special about DNS traffic over normal ping with regards to routing, I doubt there are any access lists, so if you can ping the DNS server, you should be able to access the DNS server

 

[access]

could be a nat issue

 

[PsyWulf]

Could be the metro fibre not allowing passthrough DNS? Set DNS Upstreams for each router to the one above it in the "waterfall"

 

[[OUPA]MrNutz]

Thanks guys - i'll try the same dns as test -

Requirement:
wifi router (with dhcp) (C) , has relayed internet flow from, WAN port , from
router (B) (fixed ip with no DHCP) , receiving from , WAN port , from
cisco metro fibre router (A) (no DHCP , saix IP block) .

I am going to check a manual add of dns on C and B to see if it might help and test with laptop also for manual DNS...

 

[PsyWulf]

I've had similar with Neotel where you had to use the provided router as the upstream DNS

 

[syntax]

bouncing dns lookups should not really be needed.
I would just put the DNS on the laptop, and test.
Use google DNS, then use the metro router IP as DNS.

 

[[OUPA]MrNutz]

Resolved - thank you very much all
dns1 - 196.25.1.1
dns2 - 8.8.8.8
on router (C) did the trick