topic Scott I have a few questions in Wireless

Configuring dhcp on controllers

Rosa Ladeira — Mon, 05 Jul 2021 09:53:51 GMT

Network environment:

2 AIR-WLC2106-K9

2 AIR-WLC2112-K9

7 AIR-CAP35202-I-A-K9

10 AIR-LAP1131AG-A-K9

9 AIR-LAP1252-AG-T-K9

Cisco6509-E

If controllers and APs have fixed IPs manually set, is it necessary to inform:

1. Primary and secondary DHCP Server IP on interface configuration ?

2. Conreoller Internal DHCP Scope and Leases?

3. WLAN advanced DHCP options (override, dhcp ip address)?

Thanks

Rosa

no nothing of all three when

Sebastian Helmer — Fri, 10 Apr 2015 19:45:06 GMT

no nothing of all three when u have everything manually configured...

Thanks.Is there any

Rosa Ladeira — Sat, 11 Apr 2015 12:30:20 GMT

Thanks.

Is there any controller dhcp configutaion for clients (notebooks, smartphones) ?

For your dynamic interfaces

Scott Fella — Sat, 11 Apr 2015 13:05:10 GMT

For your dynamic interfaces for clients, it's probably best practice to add your primary and secondary DHCP servers. Now with DSCP proxy enabled, the WLC will proxy the DSCP broadcast to those servers. If you disable DSCP proxy, then you will need ip helpers on your svi to forward the DHCP request. DHCP proxy might now work if a firewall is the DHCP server since they dont want to see DHCP request proxied.

-Scott

Thanks Scott.Since DSCP is

Rosa Ladera — Mon, 13 Apr 2015 13:47:00 GMT

Thanks Scott.

Since DSCP is equal zero on Mobility anchor config, it means dscp proxy is disable ?

There is no QOS configured?

Should I configure :

ip forward-protocol udp 5246

and

ip helper-address DHCP-IP-SERVER

on 6509 ports where controllers and APs are connected ?

By now, a Linux DHCP external server is offering IPs to clients:

class "Cisco AP c3500" {
       match if option vendor-class-identifier = "Cisco AP c3500";
       option vendor-class-identifier "Cisco AP c3500";
       vendor-option-space CiscoAPs;
       option CiscoAPs.server-address DHCP-IP-SERVER;
    }

should DHCP-IP-SERVER be specified as 4 decimal numbers ou f104xxyyzzaa notation ?

Thanks

Scott I have a few questions

Rosa Ladera — Fri, 17 Apr 2015 14:10:47 GMT

Scott I have a few questions based on the fact that controllers ports are connected to NX7000 interfaces.

1. I have understood that it would be desirable to configure ip forward-protocol udp 5246 and ip helper-address DHCP-IP-SERVER on interfaces where ap-manager controller port has been connected.

2. NX-OS offers ip dhcp snooping set. Have those commands the same effect ?

3. when clients (mobiles and hosts) look for a DHCP IP address it will be sufficient for avoidding brodcast floods configure snooping on its vlan?

How can I avoid brodcast

Rosa Ladera — Fri, 17 Apr 2015 14:28:37 GMT

How can I avoid brodcast floods from clients (mobiles and hosts) looking for a DHCP IP address ?

It would be sufficient configure ip dhcp snooping on clients vlan?