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Hi all We encounter issues in combination with Linux bonding (LACP) and Cisco Nexus. I am aware that there are several posts describing this issue, however none of them helped me really resolving the issue. Setup: - 2xCisco Nexus5000 - KVM Hosts attached with LACP to both nexus devices (bond0) - LACP interface and VPC is UP - KVM Bridge br9 is attached to bond0.9 (vlan 9) - Host A is a VM on the KVM host attached to br9 Issues - Downloading files from XY to Host A is slow - Uploading files from Host A to XY is fast - Based on tcpdump we could see that there are retransmissions (TCP Dup Ack, TCP Out of Order) - On the bonding interface bond0, we see incoming packets dropped On this blog there was done almost the same thing: https://raymii.org/s/tutorials/KVM_with_bonding_and_VLAN_tagging_setup_on_Ubuntu_12.04.html Did we miss something? Configuration is underneath. Thanks and regards plataleas ### KVM Host #### # cat /etc/debian_version 7.5 # uname -a Linux kvm 3.2.0-4-amd64 #1 SMP Debian 3.2.57-3 x86_64 GNU/Linux #lsmod | grep bonding bonding 79169 0 #lsmod | grep 802 8021q 23480 0 ### sysctl #### net.bridge.bridge-nf-call-ip6tables = 0### Network Config #####cat /etc/network/interfaces.conf auto bond0 iface bond0 inet static address 0.0.0.0 netmask 0.0.0.0 bond-slaves none bond-mode 4 # LACP bond-miimon 100 bond-lacp-rate 1 auto eth4 iface eth4 inet manual bond-master bond0 auto eth5 iface eth5 inet manual bond-master bond0 auto br9 iface br9 inet static address 0.0.0.0 netmask 0.0.0.0 bridge_ports bond0.9 bridge_fd 9 bridge_hello 2 bridge_maxage 12 bridge_stp off ### Cisco Nexus Config #### # interface Ethernet1/21 switchport mode trunk channel-group 4 mode active # Active = LACP # show run int po4 interface port-channel4 switchport mode trunk vpc 4 # brctl show | grep br9 br9 8000.90e2b25b8b18 no bond0.9 # cat /proc/net/bonding/bond0 Ethernet Channel Bonding Driver: v3.7.1 (April 27, 2011) Bonding Mode: IEEE 802.3ad Dynamic link aggregation Transmit Hash Policy: layer2 (0) MII Status: up MII Polling Interval (ms): 100 Up Delay (ms): 0 Down Delay (ms): 0 802.3ad info LACP rate: fast Min links: 0 Aggregator selection policy (ad_select): stable Active Aggregator Info: Aggregator ID: 2 Number of ports: 2 Actor Key: 33 Partner Key: 32773 Partner Mac Address: 00:23:04:ee:be:01 Slave Interface: eth4 MII Status: up Speed: 10000 Mbps Duplex: full Link Failure Count: 0 Permanent HW addr: 90:e2:ba:5b:8b:88 Aggregator ID: 2 Slave queue ID: 0 Slave Interface: eth5 MII Status: up Speed: 10000 Mbps Duplex: full Link Failure Count: 0 Permanent HW addr: 90:e2:ba:5b:8b:89 Aggregator ID: 2 Slave queue ID: 0 |