Ping On Symantec Director Takes About a Minute To Respond

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Article ID: 166761

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Updated On:

Products

Director

Issue/Introduction

Ping on Symantec Director takes about a minute to start responding.

 

Resolution

Director will try to do a reverse DNS (RDNS) look-up so it can display the hostname of the IP it's trying to ping. If the DNS server does not respond to the RDNS query, this will result in a delay in the ICMP request/response display.  Below is a sample of the behavior and what can be seen on the packet capture taken from Director.

director # ping 10.150.1.50
(((delay of response)))
PING 10.150.1.50 (10.150.1.50): 56 data bytes
64 bytes from 10.150.1.50: icmp_seq=0 ttl=123 time=347.995 ms
64 bytes from 10.150.1.50: icmp_seq=1 ttl=123 time=93.107 ms
64 bytes from 10.150.1.50: icmp_seq=2 ttl=123 time=428.768 ms
64 bytes from 10.150.1.50: icmp_seq=3 ttl=123 time=241.038 ms
64 bytes from 10.150.1.50: icmp_seq=4 ttl=123 time=226.852 ms
64 bytes from 10.150.1.50: icmp_seq=5 ttl=123 time=273.100 ms
64 bytes from 10.150.1.50: icmp_seq=6 ttl=123 time=274.450 ms
^C
----10.150.1.50 PING Statistics----
7 packets transmitted, 7 packets received, 0.0% packet loss
round-trip min/avg/max/stddev = 93.107/269.330/428.768/104.330 ms
director #
director #
No.     Time        Source                Destination           Protocol Info
   1977 92.996858   10.78.3.5             10.2.2.104            DNS      Standard query PTR 50.1.150.10.in-addr.arpa
   2052 97.999232   10.78.3.5             10.2.2.104            DNS      Standard query PTR 50.1.150.10.in-addr.arpa
   2218 108.009258  10.78.3.5             10.2.2.104            DNS      Standard query PTR 50.1.150.10.in-addr.arpa
   3924 128.019258  10.78.3.5             10.2.2.104            DNS      Standard query PTR 50.1.150.10.in-addr.arpa
   4544 168.029541  10.78.3.5             10.150.1.50           ICMP     Echo (ping) request
   4560 168.377415  10.150.1.50           10.78.3.5             ICMP     Echo (ping) reply
   4566 169.039177  10.78.3.5             10.150.1.50           ICMP     Echo (ping) request
   4567 169.132194  10.150.1.50           10.78.3.5             ICMP     Echo (ping) reply
*********truncated*************