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Router ICMP failure 1x weight measured

Router ICMP. router not responding to ping

Request Timed Out to host IP after 1 seconds
Events
744
Pts per check
1.4
Pts missed
1,033.3
Teams hit
7/13

Authority mappings

Which work roles, knowledge units, and EWU courses this error pattern touches. Hover for context, click to drill in.

DCWF roles: CE-442 Network Technician CS-462 Control Systems Security Specialist IT-441 Network Operations Specialist IT-451 System Administrator
Knowledge Units: CD-BNW Basic Networking CD-NSA Network Security Administration CD-NTP Network Technology and Protocols CO-M4 Computer Networks
EWU courses: CSCD330 CSCD380 CSCD434 CSCD470

What the message means

The scoring engine ping'd your router's external IP and got no echo reply in 1 second. Router ICMP is low-weight (1×, 1.39 pts/check). **do not over-invest here** when higher-weight services are also red. Common causes are simple.

Why the service is down

Commands in order

  1. 1. 1. Can the router ping anything?
    /ping 8.8.8.8 count=3
    Expect
    3 replies, 0 packet loss
    Interpret and next
    Timeout = router's outbound broken. Check `/ip route print`.
  2. 2. 2. Check input filter for ICMP
    /ip firewall filter print where protocol=icmp
    Expect
    No drop rule BEFORE any accept, OR an explicit accept rule
    Interpret and next
    If a drop is hit first: move accept before it, or `/ip firewall filter add chain=input protocol=icmp action=accept place-before=0`.
  3. 3. 3. Verify WAN interface is up
    /interface print
    Expect
    WAN (ether1 or equivalent) has R flag (running)
    Interpret and next
    No R = cable unplugged or interface disabled. `/interface enable ether1`.

Decision tree

Answer each question to route to the right fix.

Q: Does the router have outbound internet?
Yes: Input filter is dropping ICMP. Add accept rule at top of chain.
No: Fix routing / WAN first. everything else is secondary.

External references

Other patterns on this service