IBM Support

Unable to SSH to one of PDA host servers with error message "No route to host"



User can't SSH to one of host servers by either hostname or IP address.


When user SSH to PDA host server, it shows following error message:
# ssh netezza2
ssh: connect to host netezza1 port 22: No route to host

User cannot get the ping response either.

# ping prodnzbb

PING ( 56(84) bytes of data.
From ( icmp_seq=1 Destination Host Unreachable

However, user can SSH or ping the PDA host server by the internal network.

# ping ha2
PING ha2 ( 56(84) bytes of data.
64 bytes from ha2 ( icmp_seq=1 ttl=64 time=0.191 ms

Resolving The Problem

1. Check the outbound Ethernet Interface by using ethtool to make sure links are detected.

2. Check the route to host server by using tracepath or traceroute commands

3. If the result of tracepath or traceroute shows that host server is unreachable, check the /etc/hosts if the IP addresses of host servers are correct.

[{"Product":{"code":"SSULQD","label":"IBM PureData System"},"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Component":"Host","Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"1.0.0","Edition":"","Line of Business":{"code":"LOB10","label":"Data and AI"}}]

Document Information

Modified date:
17 October 2019