Continued packet loss when pinging from cluster lif
Applies to
- ONTAP 9
- Ethernet switches
Issue
- The following alerts can be seen from EMS log
Mon Feb 15 13:52:46 EET [node_1: vifmgr: vifmgr.cluscheck.ctdpktloss:alert]: Continued packet loss when pinging from cluster lif node_1_clus2 (node node_1) to cluster lif node_2_clus1 (node node_2).Mon Feb 15 10:31:39 EET [node_2: vifmgr: vifmgr.cluscheck.ctdpktloss:alert]: Continued packet loss when pinging from cluster lif node_2_clus1 (node node_2) to cluster lif node_1_clus2 (node node_1).- EMS logs may also report alerts similar to the following
Call home for CLUSTER NETWORK DEGRADED: Large MTU Packet Loss - Ping failures detected between node-03_clus1 ( X.X.X.X ) on node-03 and node-02_clus2 ( X.X.X.X ) on node-02
- CRC errors are shown in
ifstat -a
cluster::> system node run -node <NodeName> -command ifstat -a
-- interface e0a (4 days, 0 hours, 5 minutes, 46 seconds) --
RECEIVE
Total frames: 53773k | Frames/second: 155 | Total bytes: 6078m
Bytes/second: 17570 | Total errors: 59001k | Errors/minute: 10233
Total discards: 0 | Discards/minute: 0 | Multi/broadcast: 140k
Non-primary u/c: 0 | CRC errors: 55358k | Runt frames: 0
Fragment: 0 | Long frames: 0 | Jabber: 1
Length errors: 0 | No buffer: 0 | Xon: 0
Xoff: 0 | Pause: 0 | Jumbo: 0
Noproto: 0 | Error symbol: 0 | Illegal symbol: 3643k
Bus overruns: 0 | Queue drops: 0 | LRO segments: 50642k
LRO bytes: 5627m | LRO6 segments: 0 | LRO6 bytes: 0
Bad UDP cksum: 0 | Bad UDP6 cksum: 0 | Bad TCP cksum: 0
Bad TCP6 cksum: 0 | Mcast v6 solicit: 0 | Lagg errors: 0
Lacp errors: 0 | Lacp PDU errors: 0
TRANSMIT
Total frames: 74904k | Frames/second: 217 | Total bytes: 9126m
Bytes/second: 26381 | Total errors: 0 | Errors/minute: 0
Total discards: 0 | Queue overflow: 0 | Multi/broadcast: 31323
Xon: 0 | Xoff: 0 | Pause: 0
Jumbo: 219k | Cfg Up to Downs: 2 | TSO non-TCP drop: 0
Split hdr drop: 0 | Timeout: 0 | TSO segments: 8442
TSO bytes: 156m | TSO6 segments: 0 | TSO6 bytes: 0
HW UDP cksums: 153k | HW UDP6 cksums: 0 | HW TCP cksums: 74461k
HW TCP6 cksums: 0 | Mcast v6 solicit: 0 | Lagg drops: 0
Lagg no buffer: 0 | Lagg no entries: 0
DEVICE
Mcast addresses: 3 | Rx MBuf Sz: 4096
LINK INFO
Speed: 40000M | Duplex: full | Flowcontrol: none
Media state: active | Up to downs: 2