LACP configured ports interfere with PXE/DHCP on servers

EXOS All

As of EXOS 16.2, the LACP fallback feature will allow this to work.

configure sharing <MASTER_PORT> lacp fallback enable

For more detailed information on this, see the LACP Fallback page from the EXOS User Guide.

On older EXOS versions, there is a workaround using Clearflow ACL:

Clearflow with the rule-count-true function to ensure the script/command is only run when the delta changes (first time no lacp packets are received and first time lacp packets are received). 

This would be a policy like that. 
Create 1 ACL for each LAG and only apply to master port. 

Policies at Policy Server: 
Policy: cnt_lacp 
entry LACP1 { 
if match all { 
ethernet-destination-address 01:80:c2:00:00:02 ; 
ethernet-type 0x8809 ; 
} 
then { 
count LACPpkt ; 
permit ; 
} 
} 
entry LACP_detect { 
if match all { 
delta LACPpkt > 0 ; 
period 40 ; 
} 
then { 
} 
} 
entry LACP_notdetect { 
if match all { 
delta LACPpkt == 0 ; 
period 40 ; 
} 
then { 
} 
} 
entry CF_enasharing { 
if match all { 
rule-true-count LACP_detect == 1 ; 
period 40 ; 
} 
then { 
syslog Enable_Sharing info ; 
cli "either run command here to enable sharing or do that with script that does additional checks" 
} 
} 
entry CF_dissharing { 
if match all { 
rule-true-count LACP_notdetect == 1 ; 
period 40 ; 
} 
then { 
syslog Disable_Sharing info ; 
cli "either run command here to disable sharing or do that with script that does additional checks" 

} 
} 
Number of clients bound to policy: 1 
Client: acl bound once