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[EX/QFX] Displaying the results of 'show arp' takes an unusually long time

  [KB34751] Show Article Properties


Summary:

When executing 'show arp', it takes an unusually long time to return the output results.

Cause:

When configuring DNS configuration, the device will go to resolve IPs. The output of 'show arp' takes a long time because the device could not reach DNS or the DNS response is delayed.  

Solution:

There are two solutions which can solve this issue.

  1. Deactivating DNS configuration.

    Or

  2. Using no-resolve commands to check the ARP table.

no-resolve—(Optional) Do not attempt to determine the hostname that corresponds to the IP address. See technical documentation on show arp.

Example:

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[master:0][edit]
root@jtac-ex3400-48t-r2037# run show arp no-resolve 
Jan 04 07:01:31
MAC Address       Address         Interface         Flags
00:00:5e:00:01:0b 10.219.19.1     vme.0                    none
02:00:00:00:00:0b 128.0.0.5       bme0.0                   permanent
02:00:00:00:00:0b 128.0.0.6       bme0.0                   permanent
02:00:00:00:00:0b 128.0.0.17      bme0.0                   permanent
Total entries: 4
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