Wildcard Mask

Posted 2 CommentsPosted in Access-Lists, CCNA (ICND2), Routing

Before we can start to explain how routing protocols work, we need an understanding of wildcard masks.   The concept of wildcard mask is one that many people struggle with at first, but with a little time and practice it’s becomes second nature. Converting a full class subnet mask into a wildcard mask quite straight […]

Default Gateway of Last Resort

Posted Leave a commentPosted in CCNA (ICND2), Routing

In yesterday’s post ‘Static Routing’ we saw that we needed to create a static route to allow the Cisco router “AOIP.ORG” to ping “R2”. The static route that we created was ‘ip route’ and ping was successful to the IP address (R2’s Serial interface). The problem with that configuration was that […]

The difference between Run and Start and how to save!

Posted Leave a commentPosted in CCENT (ICND1), CCNA (ICND2), Maintenance

Every Cisco device has 2 sets of configurations. On routers and switches these configurations are called ‘running-config’ and ‘startup-config’ When you make any changed on a router or switch, the change applies to the running-configuration and will affect the router or switch with immediate effect. However, if the device is reloaded for whatever reason, all […]