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Operating Systems Linux Unable to add route with a specific gateway IP Post 303030857 by anaigini45 on Monday 18th of February 2019 03:13:12 AM
Old 02-18-2019
Unable to add route with a specific gateway IP

Hi,

This is the routing table on a RHEL 7 server :

Code:
[root@SIEMsmartcon3 ~]# route -n
Kernel IP routing table
Destination	Gateway		Genmask		Flags	Metric	Ref	Use Iface
0.0.0.0		10.132.81.145	0.0.0.0		UG	100	0	0   eno49
10.132.81.144	0.0.0.0		255.255.255.240	U	100	0	0   eno49
169.254.0.0	0.0.0.0		255.255.0.0	U	100	0	0   eno49		
169.254.0.0	0.0.0.0		255.255.0.0	U	1003	0	0   eno50

I tried to add a route like this, however as shown an error is thrown :

Code:
[root@SIEMsmartcon3 ~]# ip route add 10.132.81.160/28 via 10.132.81.161 dev eno50
RTNETLINK answers: Network is unreachable

The 10.132.81.161 gateway is used as a gateway for another interface in the server (eno50).
Why is the error above thrown when I try to add that line? Is it because that gateway is not initiated as a default gateway in the routing table?
 

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OCF_HEARTBEAT_ROUTE(7)						OCF resource agents					    OCF_HEARTBEAT_ROUTE(7)

NAME
ocf_heartbeat_Route - Manages network routes SYNOPSIS
Route [start | stop | monitor | reload | meta-data | validate-all] DESCRIPTION
Enables and disables network routes. Supports host and net routes, routes via a gateway address, and routes using specific source addresses. This resource agent is useful if a node's routing table needs to be manipulated based on node role assignment. Consider the following example use case: - One cluster node serves as an IPsec tunnel endpoint. - All other nodes use the IPsec tunnel to reach hosts in a specific remote network. Then, here is how you would implement this scheme making use of the Route resource agent: - Configure an ipsec LSB resource. - Configure a cloned Route OCF resource. - Create an order constraint to ensure that ipsec is started before Route. - Create a colocation constraint between the ipsec and Route resources, to make sure no instance of your cloned Route resource is started on the tunnel endpoint itself. SUPPORTED PARAMETERS
destination The destination network (or host) to be configured for the route. Specify the netmask suffix in CIDR notation (e.g. "/24"). If no suffix is given, a host route will be created. Specify "0.0.0.0/0" or "default" if you want this resource to set the system default route. (required, string, no default) device The outgoing network device to use for this route. (optional, string, no default) gateway The gateway IP address to use for this route. (optional, string, no default) source The source IP address to be configured for the route. (optional, string, no default) table The routing table to be configured for the route. (optional, string, no default) SUPPORTED ACTIONS
This resource agent supports the following actions (operations): start Starts the resource. Suggested minimum timeout: 20. stop Stops the resource. Suggested minimum timeout: 20. monitor Performs a detailed status check. Suggested minimum timeout: 20. Suggested interval: 10. reload Suggested minimum timeout: 20. meta-data Retrieves resource agent metadata (internal use only). Suggested minimum timeout: 5. validate-all Performs a validation of the resource configuration. Suggested minimum timeout: 20. EXAMPLE
The following is an example configuration for a Route resource using the crm(8) shell: primitive example_Route ocf:heartbeat:Route params destination=string op monitor timeout="20" interval="10" depth="0" SEE ALSO
http://www.linux-ha.org/wiki/Route_(resource_agent) AUTHOR
Linux-HA contributors (see the resource agent source for information about individual authors) resource-agents 1.0.3 07/05/2010 OCF_HEARTBEAT_ROUTE(7)
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