Hello.
We use few CCR 1036 routerboards as brases(dhcp serwers,pppoe-servers).
All of them work perfect since one year excluding one of them.
The problem is, that the ccr from time to time (mostly every 10-15 minutes) gets ONE DHCP Request from the clients(different clients at different vlans), and after that CCR floods the network with thousands of DHCP ACK packets and activates storm-control at many switches in the network. Some clients loose their pppoe-sessions.
[lmatys@ccr-debina-1] > system resource print ;
uptime: 22m31s
version: 6.22
build-time: Nov/11/2014 14:46:47
free-memory: 3591.1MiB
total-memory: 3969.2MiB
cpu: tilegx
cpu-count: 36
cpu-frequency: 1200MHz
cpu-load: 0%
free-hdd-space: 904.7MiB
total-hdd-space: 1024.0MiB
architecture-name: tile
board-name: CCR1036-12G-4S
platform: MikroTik
[lmatys@ccr-debina-1] > system routerboard print ;
routerboard: yes
model: CCR1036-12G-4S
serial-number: 42A2020EF90F
current-firmware: 3.19
upgrade-firmware: 3.19
[lmatys@ccr-debina-1] >
/ip dhcp-server
add add-arp=yes disabled=no interface=vlan10 lease-time=1h name=server1 use-radius=yes
add add-arp=yes disabled=no interface=vlan20 lease-time=1h name=server2 use-radius=yes
add add-arp=yes disabled=no interface=vlan30 lease-time=1h name=server3 use-radius=yes
add add-arp=yes disabled=no interface=vlan40 lease-time=1h name=server4 use-radius=yes
add add-arp=yes disabled=no interface=vlan50 lease-time=1h name=server5 use-radius=yes
At the attach, you can see the wireshark capture.
Any ideas?
Best regards.
dump4.pcapng.zip (44.4 KB)