Arris Cable Modem - TG2492S continuously / Intermittently rebooting with Cisco ASA
Scenario
Our ISP recently changed our cable modem to Arris - Model TG2492S -
We connected this modem with Cisco ASA ASA5506,
Previous Cisco modem was working perfeclty fine with our Cisco FW.
*** Firewall Details ***
Cisco Adaptive Security Appliance Software Version 9.6(1)
Device Manager Version 7.6(1)
ciscoasa up 16 hours 28 mins
Hardware: ASA5506, 4096 MB RAM, CPU Atom C2000 series 1250 MHz, 1 CPU (4 cores)
Internal ATA Compact Flash, 8192MB
BIOS Flash M25P64 @ 0xfed01000, 16384KB
Encryption hardware device : Cisco ASA Crypto on-board accelerator (revision 0x1)
Our Issue : Arris modem will keep rebooting (hard reboot) power off and will comes back after 2 - 3 min .
Modem will work for few min and will start rebooting again .
Sometimes, It will stay up for next 10 - 15 min and the moment we will start accessing our network from outside the modem will reboot . and we will lose connection .
Here is public ICMP request from outside and how log its taking for outage.
Reply from 92.61.200.223: bytes=32 time=26ms TTL=247
Reply from 92.61.200.223: bytes=32 time=33ms TTL=247
Request timed out. <« (Mode rebooting )
Request timed out.
Request timed out.
Request timed out.
Request timed out.
Request timed out.
Request timed out.
Request timed out.
Request timed out.
Request timed out.
Reply from 92.61.192.150: Destination host unreachable.
Request timed out.
Reply from 92.61.192.150: Destination host unreachable.
Reply from 92.61.192.150: Destination host unreachable.
Request timed out.
Request timed out.
Request timed out.
Reply from 92.61.192.150: Destination host unreachable.
Request timed out.
Request timed out.
Reply from 92.61.192.150: Destination host unreachable.
Reply from 92.61.192.150: Destination host unreachable.
Request timed out.
Reply from 92.61.192.150: Destination host unreachable.
Request timed out.
Request timed out.
Request timed out.
Request timed out.
Request timed out.
Reply from 92.61.200.223: bytes=32 time=30ms TTL=247 <« (Back online )
Reply from 92.61.200.223: bytes=32 time=36ms TTL=247
Reply from 92.61.200.223: bytes=32 time=27ms TTL=247
Reply from 92.61.200.223: bytes=32 time=28ms TTL=247
Troubleshooting :
We tested the issue with multiple firewalls .
Cisco Firewalls 5505
Cisco Firewalls 5506
Cisco Firewalls 5508
and the behaviour is the same .
Our ISP also replaced the modem with the new modem but it does the same -
We even replaced the Core Switches and upgraded our LAN infra but the situration is the same .
For further TS We can provide access to our Network over a Webex session if needed .
Please assist us to resolve this issue.
BR,
GoldTipu.
