Isilon: Cannot reach subnet and ping fails

Summary: Subnet not reachable and ping fails with "Invalid argument"

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Symptoms

If a subnet becomes unreachable and trying to ping the problematic IP's on the Isilon CLI shows the following, you may have a static route set incorrectly:

isi-cluster2-1# ping 10.10.11.78
PING 10.10.11.78 (10.10.11.78): 56 data bytes
ping: sendto: Invalid argument
ping: sendto: Invalid argument
ping: sendto: Invalid argument

Cause

This issue may be observed if a pool static route is set to be the same as the subnet interface route

isi-cluster2-1# isi network pools view groupnet0.subnet0.Repln_pool
                     ID: groupnet0.subnet0.Repln_pool
               Groupnet: groupnet0
                 Subnet: subnet0
                   Name: Repln_pool
                  Rules: -
            Access Zone: System
      Allocation Method: static
       Aggregation Mode: lacp
     SC Suspended Nodes: -
            Description: Used for repln-1G interfaces
                 Ifaces: 1:mgmt-1, 2:mgmt-1, 3:mgmt-1, 4:mgmt-1
              IP Ranges: 10.10.11.25-10.10.11.28
       Rebalance Policy: auto
SC Auto Unsuspend Delay: 0
      SC Connect Policy: round_robin
                SC Zone:
    SC DNS Zone Aliases: -
     SC Failover Policy: round_robin
              SC Subnet: subnet0
                 SC TTL: 0
          Static Routes: 10.10.11.0/24-10.10.11.1          <<<<<     Remove this static route and test
  NFSv3 RDMA RRoCE only: No
 
 
isi-cluster2-1# isi network subnets list -v
              ID: groupnet0.subnet0
            Name: subnet0
        Groupnet: groupnet0
           Pools: pool0, Repln_pool
     Addr Family: ipv4
       Base Addr: 10.10.11.0            <<<<<  Pool static route should not match this
            CIDR: 10.10.11.0/24
     Description: Initial subnet
       DSR Addrs: -
         Gateway: 10.10.11.1        
Gateway Priority: 1
             MTU: 1500
       Prefixlen: 24
         Netmask: 255.255.255.0
SC Service Addrs: 10.10.11.82-10.10.11.82
 SC Service Name: isi-cluster2-mgmt-ssip.gmhpost.com
    VLAN Enabled: False
         VLAN ID: -

Resolution

Remove the static route in the subnet's pool and test connectivity. 

Affected Products

Isilon
Article Properties
Article Number: 000194968
Article Type: Solution
Last Modified: 26 Aug 2022
Version:  2
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