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WLC harms the system after rebooting

Hi,

I got issues. After power outage for long time and UPS was not function. Whole appliance became down included WLCs.

Two of those which hold issues are 7.4.110.0. But another 7.2.x can continue function after power up.

7.4.110.0 made whole campus can not function. We spanned out the traffic and saw much multicast traffic send out. Question is how can those work before power outage. We re quit sure that we have saved the cnfg. And not only 1 WLC got issue but 2. We have 3 of WLC5508.

Thank for any opinion,
Nipat.p

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6 REPLIES

WLC harms the system after rebooting

Hi Nipat.p

Strange.

so the 7.2 WLC is working fine while the 7.4 WLCs are not?

are you able to access the WLCs? or they are not accessible?

have you tried to reload the WLCs one more time?

are the APs joining successfully to the WLCs?

Regards,

Amjad

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New Member

Re: WLC harms the system after rebooting

Hi,

We did reloaded yet. It not solve.

Yes, 7.2 is working fine but 7.4 is not.

Recently, we reconfigure both of WLC s with controller>general and choose from multicast to unicast (disable multicast). Network became functioning.

We tried to change 3 of multicast group from all as 255.222.222.222 to different grougp as 225.222.222.221 so on. (According to best practice) Network become down again.

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New Member

Re: WLC harms the system after rebooting

Hi

AP can join and service when using unicast mode not only 7.2 but also 7.4

But AP and whole network cannot funtion at all. We found huge multicast (S,G) come out, G is what we use ie. 225.222.222.222

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Hall of Fame Super Silver

WLC harms the system after rebooting

You should use 239.x.x.x, the last three octets should be your last three octets of your WLC management ip.

Thanks,

Scott

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-Scott
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Hall of Fame Super Silver

Re: WLC harms the system after rebooting

I agree with Amjad... There shouldn't be a difference between any WLC or code. You almost have to shut the power off and then look at the output on the AP to see what's happening.

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-Scott
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New Member

WLC harms the system after rebooting

Hi,

What is our requirement --- to use Multicast or Unicast.

I totaly agree with Scott and Amjad. This issue should not be related to the Software version used on the WLC.

Go to the Controller tab under the General page and make sure AP Multicast Mode is configured to use

Multicast mode and that a valid group address is configured. The group address is an IPv4 multicast group and is recommended to be in the 239.x.x.x-239.255.255.255 range which is scoped for private multicast applications. Do not use the 224.x.x.x, 239.0.0.x or the 239.128.0.x address ranges for the multicast group address.

Thanks and regards,

Manas Pratap Singh.

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