DHCP-Relay not working on 8320 (10.02.0020)

[v0tti]

I configured a dhcp-relay on VLAN 520:

interface vlan520
ip address 10.14.0.254/24
ip helper-address 10.13.0.4
ip helper-address 10.13.0.5

I can ping the helper addresses from the switch. The clients in VLAN 520 are sendig DHCP discover messages, but it does not recieve any answers. The 8320 doesn't see any DHCP messages:

newdawn(config)# show dhcp-relay 

 DHCP Relay Agent                 : enabled
 DHCP Request Hop Count Increment : disabled
 Option 82                        : disabled
 Response Validation              : disabled
 Option 82 Handle Policy          : replace
 Remote ID                        : mac

 DHCP Relay Statistics:

  Valid Requests Dropped Requests Valid Responses Dropped Responses
  -------------- ---------------- --------------- -----------------
  0              0                0               0                

 DHCP Relay Option 82 Statistics:

  Valid Requests Dropped Requests Valid Responses Dropped Responses
  -------------- ---------------- --------------- -----------------
  0              0                0               0                

Do I have to enable anything else for this to work?

[v0tti · Accepted solution]

Just realized the control plane acl was blocking DHCP. I do not think the control plane acl should affact the DHCP relay.

[Fabian Klaring]

What was the configuration of that control plane acl? Is it working now?

[v0tti]

My current ACL looks like this:

access-list ip management-router-acl
    10 permit udp any any eq 68
    20 permit udp any any eq 67
    30 permit icmp any any
    40 permit any management any
    50 deny any any any

The first two entries were missing earlier, now everything is working.