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Questions tagged [dropped]

15 questions
5
votes
1 answer

Linux bridge (brctl) is dropping packets

I have been researching this problem for a few days and have not found an answer yet. Your help will be really appreciated! I have a few VMs (Virtual Machines) running on a physical server. The server uses Linux bridge (br100) to connect these VMs…
Kenneth
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4
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2 answers

unexplainable packet drops with 5 ethernet NICs and low traffic on Ubuntu

I'm stuck on problem where my machine started to drops packets with no sign of ANY system load or high interrupt usage after an upgrade to Ubuntu 12.04. My server is a network monitoring sensor, running Ubuntu LTS 12.04, it passively collects…
jon
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2
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0 answers

rx_missed_errors with ring size set to maximum - udp bursts

Application A sends traffic to B via TCP. B using multicast (UDP) sends traffic further to C. Applications on D get this data via TCP. A -> (TCP) -> B -> (UDP) -> C -> (TCP) -> D A - Windows Server B - Linux VM on ESX host C - Linux VM on another…
LinuxGuy123
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2
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1 answer

when should I raise an alarm if I see dropped packets ( packet_in or packet_out)

I am trying to create a simple anomaly alarm detection by looking at the KPI of my Linux servers. I was wondering when should I flag an alarm if see dropped packets ( both packet_in and/or packet_out). If I take a percentage total packets…
sunny
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2
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0 answers

how to read the results about packet drops from crash tool

I have Linux machine red hat 7.2 because the dropping problem on eth1 interface we perform the test according to red hat link - https://access.redhat.com/solutions/206223 finally we get the following results from crash tool crash> sym…
dandan
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vote
1 answer

iptables NAT with network bridge, containers and systemd-networkd : no forwarding

I have some problem configuring an iptables NAT on CentOS 7. Currently client behind the NAT can reach the external IP but not the external network. I followed this tutorial to set up my NAT, knowing it worked well on Gentoo and Arch…
MathieuR
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STP packets dropped (1 packet every 2 seconds) when irrelevant multicast group joined on the interface

I'm trying to understand weird packet drop issue when joining particular multicast group. I think this issue is related to patch introduced in kernel ver 2.6.37 Beginning with kernel 2.6.37, it has been changed the meaning of dropped packet count.…
pst
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1
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2 answers

Redhat 7.1 - increase NIC ring buffer

My target is to increase the ring buffer ( I have Linux red-hat 7.1 ) , but I get the following: ethtool -G eth1 rx 8192 Cannot set device ring parameters: Invalid argument so how to enable this value? , or maybe this is the MAX value? the current…
yael
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1
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1 answer

FreeBSD netstat -di, Idrop vs Drop and drop count from NIC or kernel?

On FreeBSD what's the difference between Drop and Idrop in the netstat output? $ netstat -di Name Mtu Network Address Ipkts Ierrs Idrop Opkts Oerrs Coll Drop bge0* 1500 00:16:d4:e3:49:31 0 0 0…
jon
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0
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1 answer

iptables-dropped packet understanding

Today I read in my the below iptables-dropped packet logs and I don't really understand this log. I hope somebody can help me. I only opened an inbound SSH port 2221 and for my outgoing traffic I opened DNS port 53 as protocol UDP. …
beard black
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1 answer

variable number of lost UDP packets reported by iperf, linux scheduling?

I am testing a connectivity with an iperf server (iperf version 2.0.13 (21 Jan 2019) pthreads) running on a Bananpi M2+ single-board computer (Debian, 5.1.1-BPI-Kernel #1 SM). For different target bandwidths I observed different rates of packet…
BigK
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0
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1 answer

linux + dropped value from ifconfig

please advice what could be the root cause for dropped problem as the following: ( dropped 2201101 ) on Linux red-hat 7.1 eth1: flags=4163 mtu 9000 inet 12.196.92.19 netmask 255.255.255.0 broadcast…
yael
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1 answer

Cisco WAP321 dropping ARP packets

At my office we have 4 WAP321 connected directly to a Cisco 891f router. Randomly throughout the day, computers will lose access to the network. They will remain connected to the Wifi SSID, but can't ping any network resource. Not even the default…
inev
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0
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1 answer

Why are duplicated UDP packets being dropped 10 out of 11 times by this iptables configuration?

I am trying to duplicate UDP packets flowing to port 50007 on an Internet address from devices on a local NAT network (192.168.12.0/24) with the intent of processing them locally (on 192.168.12.1:50006). On 38 of my 40 devices, the following…
jonseymour
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1 answer

iptables doesn't want to log and drop simultaneously

I'm (still) trying to build an iptables firewall, but this time, I'm stuck trying to log dropped packets. Here is how I'm doing this (this code is inserted after the ACCEPT rules; $IPT represents the absolute path to iptables, here…
Penegal
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