[cisco-voip] Preservation Mode, long time for call setups...

[Kent Roberts]

Check Cisco’s docs..  Some of those modes are only supported/not supported on different setups, and configurations.   I haven’t looked lately, but last I knew the free version of VMware wasn’t supported.  (Maybe they have changed and I am out of date). 

However….

Whenever you have issues, check the SRND and make sure your base design is supported.

Good Luck!


> On Nov 27, 2019, at 5:48 PM, Jonathan Charles <jonvoip at gmail.com> wrote:
> 
> Would you recommend changing it to Originating Port ID?
> 
> 
> Jonathan
> 
> On Wed, Nov 27, 2019 at 6:25 PM Ryan Huff <ryanhuff at outlook.com <mailto:ryanhuff at outlook.com>> wrote:
> I would expect the same behavior from PAgP with ESXi.
> 
> -Ryan
> 
>> On Nov 27, 2019, at 19:19, Jonathan Charles <jonvoip at gmail.com <mailto:jonvoip at gmail.com>> wrote:
>> 
>> 
>> They are channel group ON... (so, no LACP) on the switch... 
>> 
>> 
>> Jonathan
>> 
>> On Wed, Nov 27, 2019 at 6:16 PM Ryan Huff <ryanhuff at outlook.com <mailto:ryanhuff at outlook.com>> wrote:
>> AFAIK, VMware has always required a distributed vSwitch for LACP, but the earliest reference I can find tonight is 5.1, though I believe it’s referenced the same way in the documentation of every version since then.
>> 
>> https://kb.vmware.com/s/article/2034277 <https://eur03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fkb.vmware.com%2Fs%2Farticle%2F2034277&data=02%7C01%7C%7C68933632a9034cb6982808d77398b185%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C637104971952651559&sdata=hpirlhOhpUibcfreuD26bRnR3D2w5NtTGqjxz3f0uIU%3D&reserved=0>
>> 
>> Sent from my iPhone
>> 
>>> On Nov 27, 2019, at 19:11, Ryan Huff <ryanhuff at outlook.com <mailto:ryanhuff at outlook.com>> wrote:
>>> 
>>> Route based on IP hash should be fine for 802.3ad, but technically, VMWare only supports it with a distributed vSwitch (would need an EA or Enterprise license for the hypervisor, not the “free” license) and not a standard vSwitch.
>>> I’ve seen it work with a standard vSwitch, for long periods of time even, and then the CAM table on a switch gets rebuilt (switch reload, power loss ...etc), then all hell breaks loose and you can’t get teaming to work again.
>>> 
>>> If those c220s are business editions and/or have the “free” license (non enterprise), then that’s likely a problem. You’d likely see evidence of this in the switch syslog (Mac flaps, possibly err-disable... etc).
>>> 
>>> What is the reason for suspecting you need to change the NIC teaming to active/passive?
>>> 
>>> Phones going into SRST mode (may be displayed as preservation mode on phones) is an indication the phone’s IP lost network connectivity to all the call control servers listed in the phone’s configuration (xml) file.
>>> 
>>> The delayed call setup could be due to the call traversing an unexpected/unoptimized network path, due to disruption in it’s connection to its preferred call control server.
>>> 
>>> Thanks,
>>> 
>>> Ryan
>>> 
>>>> On Nov 27, 2019, at 18:17, Jonathan Charles <jonvoip at gmail.com <mailto:jonvoip at gmail.com>> wrote:
>>>> 
>>>> 
>>>> Customer has a two C220-M4S's with CUCM 11.5... both C-series are connected to the same 4-stack 3850 (port channel, mode on)
>>>> 
>>>> Customer is reporting Preservation Mode kicking in on the LAN and some calls taking a long time to setup.
>>>> 
>>>> Currently, VMware is set to Route based on IP Hash with PAgP channel groups.
>>>> 
>>>> I think we need to change it to  Route Based on Originating Virtual Port instead, but I cannot prove it before hand...
>>>> 
>>>> What could be causing the Preservation Mode on the LAN?
>>>> 
>>>> 
>>>> Jonathan
>>>> 
>>>> 
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