Connectivity Guide

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Dell EMC Networking OS installs a next hop that is on the directly connected subnet of current IP address on the interface.
Dell EMC Networking OS also installs a next hop that is not on the directly connected subnet but which recursively resolves to a
next hop on the interface's configured subnet.
● When the interface goes down, Dell EMC Networking OS withdraws the route.
● When the interface comes up, Dell EMC Networking OS re-installs the route.
● When the recursive resolution is “broken,” Dell EMC Networking OS withdraws the route.
● When the recursive resolution is satisfied, Dell EMC Networking OS re-installs the route.
Configure Static Routes for the Management
Interface
When an IP address that a protocol uses and a static management route exists for the same prefix, the protocol route takes
precedence over the static management route.
To configure a static route for the management port, use the following command.
● Assign a static route to point to the management interface or forwarding router.
CONFIGURATION mode
management route ip-address mask {forwarding-router-address | ManagementEthernet slot/
port}
To view the configured static routes for the management port, use the show ip management-route command in EXEC
privilege mode.
DellEMC#show ip management-route
Destination Gateway State Route Source
----------- ------- ----- ------------
10.16.0.0/16 ManagementEthernet 1/1 Connected Connected
172.16.1.0/24 10.16.151.4 Active Static
Using the Configured Source IP Address in ICMP
Messages
ICMP error or unreachable messages are now sent with the configured IP address of the source interface instead of the
front-end port IP address as the source IP address. Enable the generation of ICMP unreachable messages through the ip
unreachable command in Interface mode. When a ping or traceroute packet from an endpoint or a device arrives at the null
0 interface configured with a static route, it is discarded. In such cases, you can configure Internet Control Message Protocol
(ICMP) unreachable messages to be sent to the transmitting device.
Configuring the ICMP Source Interface
You can enable the ICMP error and unreachable messages to contain the configured IP address of the source device instead of
the previous hop's IP address. This configuration helps identify the devices along the path because the DNS server maps the
loopback IP address to the host name, and does not translate the IP address of every interface of the switch to the host name.
Configure the source to send the configured source interface IP address instead of using its front-end IP address in the ICMP
unreachable messages and in the traceroute command output. Use the ip icmp source-interface interface or
IPv4 Routing
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