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Questions tagged [lag]

52 questions
10
votes
4 answers

Link bonding across multiple switches?

I've read up a little bit on bonding nics with ifenslave; what I'm having trouble understanding is whether there is special configuration needed in order to split the bonds across two switches. For example, if I have several servers that all have…
Bryan Agee
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9
votes
1 answer

SSH "lag" in LAN on some machines, mixed distros

I've had a strange problem with SSH connections inside my LAN for a few months. It only happens when I'm using my Windows 10 device to connect to a (barebone) linux machine. When I connect to a SSH server it's like my input is only sent once every…
Christian
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8
votes
1 answer

Layer 2 Loop Avoidance: Three Switches in Series

I know this seems like a homework question, but it's actually part of a larger project (and network) and need to break it down into chunks so I'm clear with what I'm doing. I've never worked with [R/M]STP and have only setup a static LAG before, so…
WuckaChucka
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5
votes
2 answers

Laggy server, seems iptables is doing the load

I added a few thousand IPs packed in multiple /24 classes to a CentOS box and because of that I am getting scanned day and night. Since this server will be a workhorse and it will only need to be available on SSH (changed SSH port) and http/s, I…
petru
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5
votes
4 answers

mysql connection is slow (5seconds)

After building my webapp on a first boot i create 2 connections to mysql on debian then 1-2 (r/w) for every page after that. The connection consistently take 5.2 seconds to connect. Debian is in a VM running in my OS. Why is the connection taking…
user274
4
votes
1 answer

High availability links on VMware ESXi

I have a cluster of 3 VMware ESXi6.0 hosts which are not licensed for VMware Distributed Switch. Currently, these hosts are configured with a static LAG between 2 ports on the server and a port each on a pair of Cisco Nexus 9372PX switches joined…
Daniel Arkley
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4
votes
1 answer

MongoDB Replica-Set with Replication Lag on one node only

we experience a strange behaviour in our MongoDB Replica-Set, setup of 3 Nodes (all Xeon Quad-Core-Class CPUs, 16GB of RAM for one, 24GB for the other two nodes) The one node with less RAM is normal secondary with priority 0, other two priority 1.…
martinseener
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3
votes
1 answer

Standard vSwitch static LAG with iSCSI hardware initiators - impossible configuration?

In one site, we have vSphere hosts with 2 10G NICs. Both NICs are in one vSwitch failover policy IP Hash for static LAG (this is to balance/failover VM traffic) Both NICs (HPE 534FLR-SFP+/QLogic 57810) have hardware iSCSI initiators enabled Each…
Don Zoomik
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3
votes
2 answers

Apache 2.4 long delay before first response

I've test server (Centos 7) in my local network with Apache 2.4. All works fine, but each time after about 1 hour of inactivity Apache responding with a lag about 4.8 sec. Next requests proccesed very fast (1-5 ms). The lag appears AFTER connection…
Alexey Iljin
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3
votes
0 answers

Dell switches, LAG config, ports stay lit when device powered off

I have two Dell switches configured in a stack (with stacking cables). I have four ports on each unit in the stack configured in two separate LAGs as follows: Unit 1/P1: LAG1 Unit 1/P2: LAG1 Unit 1/P3: LAG2 Unit 1/P4: LAG2 Unit 2/P1: LAG1 Unit…
Alan Murrell
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3
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1 answer

Static LAG and VLAN Trunking Differences?

What is the difference between Static LAG and VLAN Trunking and which would be better to use going from Switch to Switch with CAT5 in a VLAN environment?
Bump
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3
votes
4 answers

Downloading a file brings network to a crawl

I'm an IT assistant and am attempting a download of CentOS for a webserver. It's a 3.9 gig DVD ISO and whenever I start the download, or any download for that matter, it will max out at 300kbps, seems slow for a business internet…
Jordan
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2
votes
1 answer

Does TRUNCATE take a long time on huge tables 10gig+

I wonder if it is a good idea to use phpMyAdmin's empty feature on a table with ~12gb on a production server. I don't want to cause too much lag but need to free some disk space. This needs to be done on a Debian powered DELL Server: MySQL 5.1.49 …
bobble bubble
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2
votes
1 answer

LAG on one managed switch

This may be a dumb question, but is there any benefit of using LAG on only one managed switch with 2 VLAN's? By default my switch, Netgear GS724T, assigns 8 LAG's to the default VLAN. I am using VLAN1 and a created VLAN20 that I am running a…
dcol
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2
votes
0 answers

Lacp over two linux boxes - something like MC-LAG

I have two linux box'es which are gateways for some kind of virtualized network (Openvswitch, GRE). I am trying to optimize performance - so I decided, that I have to try remove routing part from them (they will be only forwarding packets to…
Krzysiek
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