All Questions
26 questions
0
votes
1
answer
36
views
Server is slow to reply to ping via WiFi interface, but not when sending traffic
The server is Fedora on amd64. It has an eth interface and an wifi one, 5GHz.
From a machine in the same LAN, when I ping the server I see:
Ping 192.168.2.20 (eth) gives <1 ms
Ping 192.168.2.21 (...
- 101
-1
votes
1
answer
190
views
Hostname and DNS for embedded devices in LAN
I'm not able to find an explanation or even related questions since I don't know exactly what is the problem and the correct keywords to use.
I'm a firmware guy and often I develop code that enables a ...
- 175
0
votes
0
answers
115
views
Setup new router with SQM - Buffer Bloating solution
Scenario. I'm in Tbilisi, Georgia.
I have very high ping to EU servers(100ms+) plus a huge buffer bloating problem, this test gave me the F rank: https://www.waveform.com/tools/bufferbloat
I use an ...
- 1
-3
votes
4
answers
2k
views
I've lost my router's ip address [closed]
I have a router connected directly to my pc and I misconfigured my router's ip address and had disabled dhcp on it prior and popped off the reset button(so resetting is not possible).Due to this, I'm ...
- 115
1
vote
1
answer
3k
views
cannot ping specific interface from router: (sendmsg: Operation not permitted)
I have router that I built running Arch Linux and I have a strange problem that might point to a misconfiguration. Here is my setup:
LAN interface: intern1
WAN interface: extern1
LAN address: 192.168....
- 111
1
vote
1
answer
2k
views
High ping latency over direct Gigabit Ethernet link on Enterprise-class hardware
FINAL EDIT 7/7 Multiple cable, port, and device substitutions have narrowed this to the Comcast modem, and on all 8 of its Ethernet ports. Given, as the comments say, this is a closed device, and ...
- 396
0
votes
1
answer
770
views
OpenVPN server cannot ping LAN behind router
I have an Asus router with IP 192.168.2.1 and a running Openvpn client 10.8.0.2.
The Openvpn server (ubuntu 18)has ip 10.8.0.1. Both client and server can ping each other.
Now one desktop (192.168.2....
- 1
2
votes
0
answers
104
views
Why does my router go down every ~16 hours and how can I debug it further?
I have a router that is connected to a larger managed network (such as a university campus network). The router is configured with a static WAN IP address and provides NAT and DHCP to the LAN.
After ...
- 121
1
vote
0
answers
127
views
Multiple routes from router advertisements
Consider the following simplified setup:
All devices are IPv6 enabled.
Interfaces are configured in a way that we have 3 networks as shown.
Router advertisments are enabled on both routers R1 & ...
- 373
1
vote
0
answers
43
views
openstack: verify routing and communicationin chain network topology
I have built a chain topology in OpenStack Network Topology. In order to verify, if the node could communicate each other, I have tried to use the VM to ping the addresses of them. A simple example is ...
- 11
0
votes
1
answer
3k
views
Ping request timeout, followed by >10s times from laptop, but not from router
Using my router's built-in Ping diagnostic, I can ping sites and get times <100ms routinely. Using my laptop, or any other device, wired or wireless, I first receive a bunch of Request Timeout ...
- 187
0
votes
1
answer
196
views
SafeNet Sentinel RMS server needs to be pinged before it works (routed across VLANs)
I have 2 separate CAD programs that use the Safenet Sentinel RMS Server (Aladdin) to check the license.
After boot, they cannot find the license server.
The license server is configured using its ip ...
- 65
1
vote
0
answers
28
views
trouble setting up a small network- Can't Ping BorderGateway
RTR Configuration : http://pastebin.com/Pg4SxG65
Network Topolgy: https://goo.gl/h043A7
BR: its an RV320 if you guys need some info let me know. It's running DHCP to provide ip address to the ...
- 111
3
votes
3
answers
26k
views
Pinging a host from a router through the selected interface
In a typical Cisco router it's possible to ping a host from the router's OS. When the ping packet leaves router (call it R1) through the fa0/0 interface, the source IP of that packet it set to the IP ...
- 279
0
votes
2
answers
312
views
2 Lans, 1 router, need to ping eachother ip [closed]
I have 2 LANs:
LAN 1 192.168.2.1/24
LAN 2 192.168.3.1/24
I have a device on tLAN 2 with IP-address 192.168.3.61. My laptop is on LAN 1 with 192.168.2.100. My final goal is to ping the device like ...
- 11
1
vote
2
answers
10k
views
Linux router: ping responses going through the wrong interface
I have a Debian server acting as a router for a small network. It has 3 network interfaces, one LAN and 2 WANs (two different ISPs, let's call them A and B, each of them with a public static IP ...
- 983
2
votes
2
answers
2k
views
Unexplained 0.1% packets time out when pinging from router
I'm troubleshooting a customer who requires the ability to send 5000 pings from the router to their remote site over a satellite link with zero timeouts, yet they keep experiencing one to five packets ...
- 235
0
votes
1
answer
654
views
Branch to Branch VPN through HQ router?
I've just upgraded our router and am working my way through setting it up as the old one was. The new router is a Draytek Vigor 3900.
We have a number of sites with IPSec tunnels dialling in to our ...
- 2,737
0
votes
1
answer
456
views
ubuntu set up as router lan pc can ping one direction and get shares but other direction can not ping or connect shares
I have ubuntu router questions.
you can see tracert can complete on way but not other way.
How to make that work?
(a better visual layout exists here)
http://ubuntuforums.org/showthread.php?p=...
- 11
14
votes
5
answers
30k
views
Linux router: ping doesn't route back
I have a Debian box which I'm trying to set up as a router and an Ubuntu box which I'm using as a client.
My problem is that when the Ubuntu client tries to ping a server on the Internet, all the ...
- 983
0
votes
3
answers
217
views
Anomalous behavior of Routers
I am observing anomalous behavior Cisco concerning routers.
Scenario 1:
Ping from Server A to Cisco Router 1905 - 0.3 ms
Ping from Server A through Cisco Router 1905 to Server B - 3.2 ms
Scenario ...
- 1
-1
votes
2
answers
646
views
Why can't my networks reach each other?
We have two Buffalo WZR-HP-G300NH2 routers, with the default firmware, DD-WRT v24SP2-MULTI (10/31/11) std - build 17798. Each has a separate cable internet connection with a public static IP address. ...
- 163
5
votes
1
answer
14k
views
Loop redirect when ping my gateway
I have a router with WAN and LAN setup and act as DHCP server/gateway on my local LAN. The IP address is 192.168.1.1.
Today, I was hit by an internet failure and I checked the ping and get this ...
- 703
5
votes
1
answer
720
views
How can I use ping with a large packet size to troubleshoot network issues?
What types of network problems can be identified with ping of a large packet size?
- 9,043
5
votes
2
answers
11k
views
How network devices affect TTL
When I do a ping, I can see the TTL value for each packet. For every router that I insert in between my computer and the router that connects to the internet, the TTL value goes down by one. However, ...
- 375
4
votes
4
answers
8k
views
Are network and broadcast IPs supposed to respond?
I have a /24 network that is subnetted into a bunch of small chunks.
I have recently gone into each router on the network (mostly Cisco) in order to document how this network had been divided. Now ...
- 1,618