Configuring Multiple Default Routes in Linux November 19, 2007 â 4:14 am Posted in Linux Tagged Linux, multiple routes, routing Assume you have a Linux system with more than one network interface card (NIC) â say eth0 and eth1. By default, administrators can define a single, default route (on eth0). However, if you receive traffic (i.e., ICMP pings) on eth1, the return traffic will go out eth0 by

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