This article provides step-by-step guidance for identifying and resolving issues with a directly connected destination, SRX being the source of the communication

Unable to ping the next hop for the default route or any destination over direct route

1. Check interface status

• Confirm the interface is in up/up state

show interfaces terse

show interfaces <interface-name> extensive

1.1 If down verify physical connectivity

• Ensure all cables are securely connected and free of damage.
• Check LED indicators on both ends of the link for activity.

2. Validate Interface Configuration

• Ensure the interface is correctly configured with:
  • Proper zone assignment
  • Matching MTU settings
  • Correct speed and duplex settings
  • Accurate VLAN configuration (if applicable)

show configuration interfaces <interface-name

3. Inspect Firewall Filters

• Check for any firewall filters applied to the interface that may be blocking traffic.
• Also verify if any filters are applied to the lo0 interface that could be blocking host outbound traffic

4. Verify ARP Entries

• Ensure ARP entries for the connected peer are present and correct

show arp

5. Check Routing Table

• Ensure the correct routes are present and pointing to the direct Connect interface

show route <destination-IP>

6. Review Security Policies

• Look for any security policies involving the junos-host zone that might be affecting traffic flow 

8. Check the Next Hop Device

• If all SRX-side checks are clear and the issue persists, investigate the next hop device (e.g switch or host) for configuration or hardware issues.

2025-07-25 : Article Created

2025-08-14 : added srx branch&HE, change visibility to public