Scenario: Would like redundancy on 2 x 5508's but unable to utilise HA (SSO) due to internal WLC DHCP requirements.
Mobility groups - Can 2 controllers in the same mobility group share a DHCP scope? I.E overlapping addresses or would the scope need to be split across controllers?
If scopes are slit hat happens to DHCP requests once the primary DHCP server has allocated all leases? Also what happens if a clients joined controller A receives valid IP address then controller A goes off line? AP's re-establish with controller B but client has invalid scope IP?
DHCP isn't shared between controllers. If you want to share scopes you can split the start and end range between them .. Ive done this before and it works well. We split guest scopes this way. It works.
DHCP isn't trivial. Its simply an address given to a device. If a device gets an IP from controller A and it goes down and the AP moves over to controller B the client will shift with it. If the client lost connection and required to reIP then it would get a new IP from the new controller.
"Satisfaction does not come from knowing the solution, it comes from knowing why." - Rosalind Franklin ___________________________________________________________
Actually in the Mobility Group you enable the user to move form one WLC APs coverage to other WLC APs coverage with same client IP configuration.. so if we make groups then obviously we should make different DHCP scope to avoid network address range exhausted.
As far as controller A is up, IP configuration on wireless client would be remain same, but if your controller A goes off then the client will acquire the new IP from different DHCP scope which is assigned to controller B.
Transferring Crash file from standby:
Login to the Active WLC in HA.
(Cisco Controller) >transfer upload datatype crash
(Cisco Controller) >transfer upload filename <Desired filename>
(Cisco Controller) >transfer up...
This is the start of a display filter cross reference between Wireshark and OmniPeek.
The 1st installment is a table of advanced filters. More filters will be added as time allows.
It is a living doc, so check back for changes every so often
Please feel ...
I have created a Powershell script to automatically add a Wireless Guest User on Cisco WLCs. (tested on 2500 Series)
The script should be completely self explanatory.
Powershell SNMP Module (Install-Module -Name SNMP)
SNMP Write Access to...