Hello Everybody!

 

Here are the old bug that migrated from er6120 but still not fixed.

Config:

 

DHCP Server:

Starting IP 172.18.1.129

Ending IP 172.18.1.199

+128 IPs in DHCP Address Reservation (1~128)

+128 IP-MAC Bindings (1~128)

• Enable ARP Spoofing Defense

• Permit the packets matching the IP-MAC Binding entries only

• Send GARP packets when ARP attack is detected (1000ms)

 

Bug description:

 

Modifying random IP-MAC in Address Reservation table and in IP-MAC Binding in ~50% of cases will caused this MAC will got NOT FIXED IP, but floating IP from Starting-Ending IP Range. In the other ~50% everything will goes ok! The problem will gone after 8411 reboot! Rebooting is needed but it tooks too much time.

 

Example:

 

IP 172.18.1.55 MAC 00-11-22-33-44-55 recorder in DHCP

now we changing MAC to 00-22-33-44-55-66 in Reservation table and in IP-MAC Binding (Anti-Arp Spoofing)

the result wil be 50/50:

1. User will got 172.18.1.55 

2. User will got 172.18.1.129~199 before 8411 Rebooting! 

 

I've tried to disable-enable DHCP, MAC-Binding - does not help.

Rebooting Only!

 

who faced with this problem else?

 

Best Regards!