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ER7212PC does not properly route between VLANs nor WAN (no internet)

ER7212PC does not properly route between VLANs nor WAN (no internet)

ER7212PC does not properly route between VLANs nor WAN (no internet)
ER7212PC does not properly route between VLANs nor WAN (no internet)
2 weeks ago - last edited a week ago
Tags: #VLAN & Multi-Networks #Network Connectivity #Routing
Model: ER7212PC  
Hardware Version: V1
Firmware Version: 1.3.1 Build 20250220 Rel.67749

Hi,

for the last couple days , my ER7212PC which is configured with 8 VLANs and one WAN, keeps facing routing problem between VLANs, and inability to access internet . in other words general routing issue. and it intermittent. sometimes pinging and routing properly, and othertimes (or most of the times) not pinging at all ... I am connected by cable ethernet to ER7212PC, and I cant ping anything except for ER7212PC VLANs gateway IPs (e.g. 10.100.x.1).
I did reboot, problem get resolved for few minutes then return back. so I did facotry reset (twice), and as soon as I configure the VLANs, and while everything is working fine, the problem arrises again.
I am using latest firmware 1.3.1 Build 20250220 Rel.67749 (V1)
I got crazy .... my Mac Mini IP is 10.100.10.10, I can ping anything on same VLAN, but I cannt ping any other machine on different VLAN, such as 10.100.50.2. 
then after few minutes, all pings work normaly for few minutes, then again without any ping. 
lets ignore that I cannot ping WAN IPs (such as google dns 8.8.8.8), but why I cant ping local VLANs machines, which all are directly connected to ER7212PC other ports with different PVID (50, 60) ????
 

anyone else is facing similar problem ???

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#1
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1 Accepted Solution
Re:ER7212PC does not properly route between VLANs nor WAN (no internet)-Solution
2 weeks ago - last edited a week ago

Hi @demir-deniz 

Thanks for posting in our business forum.

Then, a diagram to describe your network?

It only happened a few days ago, so what did you add to the network or change anything? It cannot fail without a change.

 

And you cannot ping from 10.100.10.0 to 10.100.50.0, do you have any ACLs?

No one faces a similar problem recently, nor in the test I have had with the ER7212PC. Provide more details, and let's see.

Best Regards! If you are new to the forum, please read: Howto - A Guide to Use Forum Effectively. Read Before You Post. Look for a model? Search your model NOW Official and Beta firmware. NEW features! Subscribe for the latest update! ☛Download Beta Here☚ ☛ ★ Configuration Guide ★ ☚ ☛ ★ Knowledge Base ★ ☚ ☛ ★ Troubleshooting ★ ☚ ● Be kind and nice. ● Stay on the topic. ● Post details. ● Search first. ● Please don't take it for granted. ● No email confidentiality should be violated. ● S/N, MAC, and your true public IP should be mosaiced.
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Re:ER7212PC does not properly route between VLANs nor WAN (no internet)-Solution
2 weeks ago - last edited a week ago

Hi @demir-deniz 

Thanks for posting in our business forum.

Then, a diagram to describe your network?

It only happened a few days ago, so what did you add to the network or change anything? It cannot fail without a change.

 

And you cannot ping from 10.100.10.0 to 10.100.50.0, do you have any ACLs?

No one faces a similar problem recently, nor in the test I have had with the ER7212PC. Provide more details, and let's see.

Best Regards! If you are new to the forum, please read: Howto - A Guide to Use Forum Effectively. Read Before You Post. Look for a model? Search your model NOW Official and Beta firmware. NEW features! Subscribe for the latest update! ☛Download Beta Here☚ ☛ ★ Configuration Guide ★ ☚ ☛ ★ Knowledge Base ★ ☚ ☛ ★ Troubleshooting ★ ☚ ● Be kind and nice. ● Stay on the topic. ● Post details. ● Search first. ● Please don't take it for granted. ● No email confidentiality should be violated. ● S/N, MAC, and your true public IP should be mosaiced.
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Re:ER7212PC does not properly route between VLANs nor WAN (no internet)
a week ago

  @demir-deniz 

demir-deniz wrote

Hi,

for the last couple days , my ER7212PC which is configured with 8 VLANs and one WAN, keeps facing routing problem between VLANs, and inability to access internet . in other words general routing issue. and it intermittent. sometimes pinging and routing properly, and othertimes (or most of the times) not pinging at all ... I am connected by cable ethernet to ER7212PC, and I cant ping anything except for ER7212PC VLANs gateway IPs (e.g. 10.100.x.1).
I did reboot, problem get resolved for few minutes then return back. so I did facotry reset (twice), and as soon as I configure the VLANs, and while everything is working fine, the problem arrises again.
I am using latest firmware 1.3.1 Build 20250220 Rel.67749 (V1)
I got crazy .... my Mac Mini IP is 10.100.10.10, I can ping anything on same VLAN, but I cannt ping any other machine on different VLAN, such as 10.100.50.2. 
then after few minutes, all pings work normaly for few minutes, then again without any ping. 
lets ignore that I cannot ping WAN IPs (such as google dns 8.8.8.8), but why I cant ping local VLANs machines, which all are directly connected to ER7212PC other ports with different PVID (50, 60) ????
 

anyone else is facing similar problem ???

please excuse me guys ... after posting the above issue, I discovered that my ER7212PC router was under DDoS attack, and ER7212PC with standard settings kept hanging and rebooting non-stop till I disconnect the WAN port. so I enabled Flood Defense, and after some tuning I managed to keep ER7212PC alive during the non-stop DDoS attack.

 

 

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