I have noticed very high ping round trip times to the 7920 phones at six different sites. The voice is fine with no breakups. Is this a non-issue or something to worry about? I can't find any documentation from Cisco on this. Thanks.
I am noticing the same thing on 7921g phones connected to WLC 4402 running 188.8.131.52. The voice conversation itself does not suffer which makes me not trust a "ping" in this scenario. It would be helpful for Cisco to clear up what these high pings times are actually reflecting.
ICMP should not be a protocol prioritized like voip packets. Thus also the AP or intermediate equipment like switches could add to the ping delay in transmitting other packets first. On the AP it also depends on the QoS settings for best effort traffic (above or below background). So even if a phone is on call, ping does not give precise values, unless you use an extended ping and set the TOS value to 184 (ef). If you do so on the other hand, you could interfere with your voip packets and degrade voice quality in the worst case.
Transferring Crash file from standby: Login to the Active WLC in HA.
From CLI: (Cisco Controller) >transfer upload datatype crash (Cisco
Controller) >transfer upload filename (Cisco
Controller) >transfer upload mode tftp (Cisco Controller) >transfer
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