PowerScale OneFS: Alert Seen When IP Range is Too Small for Number of Interfaces in a Pool

Summary: Alert seen when the IP range is too small for the number of Interfaces in a Pool: Aggregate network link 10gige-agg-1 (lagg0) error, interfaces down: All; no addresses

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Symptoms

Per general recommendation, Pools should contain enough IP addresses to cover the number of interfaces added to the pool. For optimal load-balancing if a node fails, dynamic IP pools require N*(N-1) IP addresses, where N is the number of nodes or interfaces that participate in the pool.
 
NOTE: The recommendation does not prohibit or restrict creating an IP pool with a single IP across multiple node interfaces. Such setups may be used for third-party solution integration.

Recurring alerts similar to the following are seen when there is no issues with physical interfaces: 
Aggregate network link 10gige-agg-1 (lagg0) error, interface(s) down: all; no addresses

Cluster-4# isi events show 1.7434
ID: 1.7434
Type: 200020004
Severity: critical
Value: 2.0
Message: Aggregate network link 10gige-agg-1 (lagg0) error, interface(s)...
Node: 1
Lifetime: Fri Dec 9 09:59:22 2016 - Now
Quieted: Not quieted
Specifiers: lnn: 1
thresh: 1.0
phys_iface: ''
val: 2
nic: ''
ifname: '10gige-agg-1 (lagg0)'
devid: 1
phys_ifaces: 'all; no addresses'
Coalesced by: --

Cause

  • There are not enough IP addresses configured in a pool's range to cover the number of interfaces which have been added to the pool.
  • The pool may have the rebalance policy set to "Manual" in which case IPs are not moved back onto an interface automatically, and by nature of this setting must manually have a rebalance command issued.

Resolution

  1. Verify that there is a pool without enough IP addresses in the range to cover the number of interfaces configured by running the below command and analyzing the output. In the example output below, we see one IP address in the range where 10 interfaces are configured in the pool:
isi network interfaces list -v

subnet1:pool1 - HDFS Name Node
          In Subnet: subnet1
         Allocation: Dynamic
             Ranges: 1
                     10.10.76.80-10.10.76.80
    Pool Membership: 10
                     1:10gige-agg-1 (up)
                     2:10gige-agg-1 (up)
                     3:10gige-agg-1 (up)
                     4:10gige-agg-1 (up)
                     5:10gige-agg-1 (up)
                     6:10gige-agg-1 (up)
                     7:10gige-agg-1 (up)
                     8:10gige-agg-1 (up)
                     9:10gige-agg-1 (up)
                     10:10gige-agg-1 (up)
   Aggregation Mode: Etherchannel (FEC)
        Access Zone: Zone-Prod-Cust (3)
       SmartConnect:
                     Suspended Nodes  : None
                     Auto Unsuspend ... 0
                     Zone             : zonename.test.local
                     Time to Live     : 0
                     Service Subnet   : Prod-Customer
                     Connection Policy: Round Robin
                     Failover Policy  : Round Robin
                     Rebalance Policy : Automatic Failback
  1. Add a range of IP addresses to the pool to meet or exceed the number of configured interfaces in the pool, or remove interfaces to meet the allotment of IP addresses configured for the pool.

Επηρεαζόμενα προϊόντα

PowerScale OneFS

Προϊόντα

PowerScale OneFS
Ιδιότητες άρθρου
Article Number: 000063951
Article Type: Solution
Τελευταία τροποποίηση: 28 Φεβ 2024
Version:  3
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