Hello, I have an observation on one of my setups with Xen hypervisor based computes. When I compare it with another user setup I see a difference and I am not able to get a lead on how to either solve it or have a better understanding of it.
Observation with SAR command is that there are rxdrops/s showing large numbers on a silent system (i.e just VM up, no traffic): [vmserver02]sar -n EDEV 1 2| grep br-bond1 IFACE rxerr/s txerr/s coll/s rxdrop/s txdrop/s txcarr/s rxfram/s rxfifo/s txfifo/s 03:05:21 AM br-bond1 0.00 0.00 0.00 14.43 0.00 0.00 0.00 0.00 0.00 03:05:22 AM br-bond1 0.00 0.00 0.00 11.22 0.00 0.00 0.00 0.00 0.00 Average: br-bond1 0.00 0.00 0.00 12.82 0.00 0.00 0.00 0.00 0.00 It is observed that there are VRRP packets coming in. When *This is what the port statuses on openvswitch w.r.t br-bond1:* *[vmserver02 ] ovs-ofctl show br-bond1* *OFPT_FEATURES_REPLY (xid=0x2): dpid:00000010e073680d* *n_tables:254, n_buffers:256* *capabilities: FLOW_STATS TABLE_STATS PORT_STATS QUEUE_STATS ARP_MATCH_IP* *actions: OUTPUT SET_VLAN_VID SET_VLAN_PCP STRIP_VLAN SET_DL_SRC SET_DL_DST SET_NW_SRC SET_NW_DST SET_NW_TOS SET_TP_SRC SET_TP_DST ENQUEUE* *1(bond1): addr:00:10:e0:73:68:0d* * config: 0* * state: 0* * current: 1GB-FD* * speed: 1000 Mbps now, 0 Mbps max* *2(phy-br-bond1): addr:f2:ba:1e:4e:50:3c* * config: 0* * state: 0* * speed: 0 Mbps now, 0 Mbps max* *LOCAL(br-bond1): addr:00:10:e0:73:68:0d* * config: PORT_DOWN* * state: LINK_DOWN* * speed: 0 Mbps now, 0 Mbps max* *OFPT_GET_CONFIG_REPLY (xid=0x4): frags=normal miss_send_len=0* *The VRRP protocol trace in OVS says like below:* [*vmserver02 ] ovs-appctl -t /var/run/openvswitch/ovs-vswitchd.1.ctl ofproto/trace br-bond1 in_port=1,dl_type=0x0800,nw_proto=112* *Bridge: br-bond1* *Flow: ip,metadata=0,in_port=1,vlan_tci=0x0000,dl_src=00:00:00:00:00:00,dl_dst=00:00:00:00:00:00,nw_src=0.0.0.0,nw_dst=0.0.0.0,nw_proto=112,nw_tos=0,nw_ecn=0,nw_ttl=0* *Rule: table=0 cookie=0 priority=1* *OpenFlow actions=NORMAL* *no learned MAC for destination, flooding* * Resubmitted flow: unchanged* * Resubmitted regs: reg0=0x0 reg1=0x0 reg2=0x0 reg3=0x0 reg4=0x0 reg5=0x0 reg6=0x0 reg7=0x0* * Resubmitted odp: 3* * Resubmitted megaflow: recirc_id=0,skb_priority=0,ip,in_port=1,vlan_tci=0x0000/0x1fff,dl_src=00:00:00:00:00:00,dl_dst=00:00:00:00:00:00,nw_frag=no* * Rule: table=0 cookie=0 priority=2,in_port=1 **à** Below with KVM setup, the in_port changes.* * OpenFlow actions=drop* *Final flow: unchanged* *Megaflow: recirc_id=0,skb_priority=0,ip,in_port=1,vlan_tci=0x0000/0x1fff,dl_src=00:00:00:00:00:00,dl_dst=00:00:00:00:00:00,nw_frag=no* *Datapath actions: 3* *Flows are:* *[vmserver02 ]ovs-ofctl dump-flows br-bond1* *NXST_FLOW reply (xid=0x4):* *cookie=0x0, duration=30429.615s, table=0, n_packets=21143537, n_bytes=6252688518, idle_age=0, priority=1 actions=NORMAL* *cookie=0x0, duration=25650.506s, table=0, n_packets=890, n_bytes=95200, idle_age=10, priority=4,in_port=2,dl_vlan=3 actions=mod_vlan_vid:5,NORMAL* *cookie=0x0, duration=29891.933s, table=0, n_packets=8760764, n_bytes=1461426392, idle_age=0, priority=4,in_port=2,dl_vlan=1 actions=mod_vlan_vid:9,NORMAL* *cookie=0x0, duration=29891.153s, table=0, n_packets=11884172, n_bytes=3429854491, idle_age=0, priority=4,in_port=2,dl_vlan=2 actions=mod_vlan_vid:4,NORMAL* *cookie=0x0, duration=25632.544s, table=0, n_packets=889, n_bytes=95130, idle_age=10, priority=4,in_port=2,dl_vlan=4 actions=mod_vlan_vid:6,NORMAL* *cookie=0x0, duration=30428.811s, table=0, n_packets=0, n_bytes=0, idle_age=30428, priority=2,in_port=2 actions=drop* On the other user setup also, there are VRRP packets coming in and the protocol trace on it shows as being dropped, yet the SAR command does not show them. ovs-ofctl show br-eno1 *OFPT_FEATURES_REPLY (xid=0x2): dpid:00000010e0849912* *n_tables:254, n_buffers:256* *capabilities: FLOW_STATS TABLE_STATS PORT_STATS QUEUE_STATS ARP_MATCH_IP* *actions: OUTPUT SET_VLAN_VID SET_VLAN_PCP STRIP_VLAN SET_DL_SRC SET_DL_DST SET_NW_SRC SET_NW_DST SET_NW_TOS SET_TP_SRC SET_TP_DST ENQUEUE* *1(eno1): addr:00:10:e0:84:99:12* * config: 0* * state: 0* * current: 10GB-FD COPPER AUTO_NEG* * advertised: 100MB-FD 1GB-FD 10GB-FD COPPER AUTO_NEG* * supported: 100MB-FD 1GB-FD 10GB-FD COPPER AUTO_NEG* * speed: 10000 Mbps now, 10000 Mbps max* *2(phy-br-eno1): addr:3a:14:3c:63:45:f8* * config: 0* * state: 0* * speed: 0 Mbps now, 0 Mbps max* *LOCAL(br-eno1): addr:00:10:e0:84:99:12* * config: 0* * state: 0* * speed: 0 Mbps now, 0 Mbps max* *OFPT_GET_CONFIG_REPLY (xid=0x4): frags=normal miss_send_len=0* *ovs-appctl -t /var/run/openvswitch/ovs-vswitchd.1869.ctl ofproto/trace br-eno1 in_port=1,dl_type=0x0800,nw_proto=112* *Bridge: br-eno1* *Flow: ip,metadata=0,in_port=1,vlan_tci=0x0000,dl_src=00:00:00:00:00:00,dl_dst=00:00:00:00:00:00,nw_src=0.0.0.0,nw_dst=0.0.0.0,nw_proto=112,nw_tos=0,nw_ecn=0,nw_ttl=0* *Rule: table=0 cookie=0 priority=1* *OpenFlow actions=NORMAL* *no learned MAC for destination, flooding* * Resubmitted flow: ip,metadata=0,in_port=2,vlan_tci=0x0000,dl_src=00:00:00:00:00:00,dl_dst=00:00:00:00:00:00,nw_src=0.0.0.0,nw_dst=0.0.0.0,nw_proto=112,nw_tos=0,nw_ecn=0,nw_ttl=0* * Resubmitted regs: reg0=0x0 reg1=0x0 reg2=0x0 reg3=0x0 reg4=0x0 reg5=0x0 reg6=0x0 reg7=0x0* * Resubmitted odp: 3* * Resubmitted megaflow: recirc_id=0,skb_priority=0,ip,in_port=1,vlan_tci=0x0000/0x1fff,dl_src=00:00:00:00:00:00,dl_dst=00:00:00:00:00:00,nw_frag=no* * Rule: table=0 cookie=0 priority=2,in_port=2* * OpenFlow actions=drop* *Final flow: unchanged* *Megaflow: recirc_id=0,skb_priority=0,ip,in_port=1,vlan_tci=0x0000/0x1fff,dl_src=00:00:00:00:00:00,dl_dst=00:00:00:00:00:00,nw_frag=no* *Datapath actions: 3*
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