Cisco Bug: CSCuw40409 - DOC -Mobility/DHCP fails if L3 link between 4500 and uplink switch
Feb 26, 2018
- Cisco Catalyst 4000 Series Switches
Known Affected Releases
Symptom: DHCP discover packets not being forwarded upstream in a Guest Foreign/Anchor setup with a 4500 as MA with interim 5760 MC to a 5508 Anchor controller when 4500 switch and uplink is on L3 routed port Conditions: Topology: [AP]--[4500 MA(Foreign)]--[5760 MC]--[5508 MC(Anchor)] 4500: 3.7.0 5760: 3.6.2 5508: 18.104.22.168 We see the 4500 is not forwarding the client DHCP discover on the mobility tunnel. We have identified the trigger to be the 4500 uplink port to be layer 3 routed. When the uplink port is made l2 switchport, all works fine.
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