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Jul
28
comment NAPI vs Adaptive Interrupts
@Alex Hardware interrupts must be used to notify the kernel there is traffic to receive. An "old style" interrupt handler schedules packet receive then re-enables interrupts. A NAPI interrupt handler disables interrupts, schedules a poller, and re-enables interrupts. The poller performs packet receive for a certain amount of packets, and as long as there is traffic to service the poller keeps running, the aim being to prevent hard interrupts by always drawing traffic off the NIC. When traffic dies down, the poller exits and the system goes back to waiting for an interrupt.
May
28
awarded  Yearling
May
21
comment Circular directory structure
What's the exact message you get? Is it the directory <name> contains a readdir loop? This can happen because the NFS Server returns the same READDIR cookie for two different files in the same directory. If so, this would be a bug in the NFS Server.
May
21
comment Circular directory structure
The inode number does not matter, at least on Linux. It is expected that different NFS exports could have files which share the same inode number. This is possible because an export is a filesystem, and inodes are only unique to the filesystem. Both Linux NFS Server and Client can handle files in different NFS exports with the same inode number (at least in RHEL6 and 7).
May
21
comment Tcpdump/Iptables on bridge interface without assigned IP address
I don't know if this is helpful, but a bridge interface will only see traffic one way in a packet capture. You would be better to perform a packet capture on the bridge port interfaces, i.e tap0 and tap1
May
21
comment arp problems with transparent bridge on linux
I understand, though I still think you've got a network loop elsewhere in the network and ARP is being broadcast back to you. Maybe that's a behaviour of VMWare or a setting within the VMWare VSwitch?
Mar
9
awarded  Revival
Feb
25
awarded  Revival
Feb
15
awarded  Revival
Feb
12
comment Linux bond mode 4 (802.3ad) - 2 switch - 4 NIC
@Tonny Sorry I've never been able to find good documentation for Debian/Ubuntu bonding configuration. It's done in /etc/networking/interfaces but I don't know the exact lines. Try using /etc/modprobe.conf instead?
Jan
30
comment Linux bond mode 4 (802.3ad) - 2 switch - 4 NIC
options bonding miimon=100 mode=4 ad_select=bandwidth though I'm primarily a RHEL/CentOS guy, where the correct place to configure bonding is in /etc/sysconfig/network-scripts/ifcfg-bondX using BONDING_OPTS="miimon=100 mode=4 ad_select=bandwidth"
Jan
20
answered Teaming two NIC: iperf shows 200MB/s downloads but only 100MB/s upload
Jan
18
comment How do I bond eth0 to failover to wlan0 after WAN connection loss?
Cool :) If you wish, you could post the bonding part of your /etc/network/interfaces file to help others who have the same question.
Jan
16
comment How can I block all traffic to/from an bridged interface while allowing DHCP?
Excellent, many thanks for your edit to the answer too!
Jan
16
awarded  Custodian
Jan
16
reviewed Approve How can I block all traffic to/from an bridged interface while allowing DHCP?
Jan
15
comment How can I block all traffic to/from an bridged interface while allowing DHCP?
I've edited my answer to include full commands. You could combine the ports as you've done with 67:68, good idea.
Jan
15
revised How can I block all traffic to/from an bridged interface while allowing DHCP?
added full commands
Jan
15
comment How to set ethernet devices to specific hardware on Centos 7
I have heard that you can disable systemd naming and biosdevname to name devices like this but you cannot use ethX. You could use netX or mydevice or bestnetworkcard1 but not eth0, eth1, etc. Give that a go.
Jan
15
answered How can I block all traffic to/from an bridged interface while allowing DHCP?