im trying to make sense of a.. routing table ? is it? to complete a homework question but i just dont understand can someone please explain? i sort of understand the jist of them but like, each line is another hop right> from, where to where tho? i also dont understand why 2 detinations would say default and why thered be a 0.0.0.0 im lost. couldnt find it in the book for the life of me also user vs perm?? ugh ;/ thanks so much
Hi, You may want to check out this webpage, specifically table 20 where they break down all the different fields of these tables. http://www.juniper.net/techpubs/sof...otocols/html/protocols-monitor-generic13.html It seems that the user entry denotes a user configured route or installed by a routing protocol whereas perm is one that was installed by the kernel when the routing table is initialized. The first default in your picture seems to be a MAC address, the second one has the rejected code so I would assume that route, which was installed by the kernal, is no longer working. This is another page that helps a little http://www.juniper.ie/techpubs/en_U...how-route-forwarding-table-vrf-ex-series.html
This page talks about those default entries, and the 0.0.0.0 as well. http://docstore.mik.ua/orelly/networking_2ndEd/tcp/ch02_04.htm The default is the default route and is a reserved network number. If there are no matching destinations in the destination list, it will use the default route which should use the system's default gateway to transmit the data. I think the 0.0.0.0 is also a default and the local gateway will be pointed to if this is used (I think..) . The destination column in your picture shows possible destinations that a packet's IP can be compared to. If there is a match, it will try to send the packet based on the information for the corresponding entry. The next hop I believe is a gateway or router that it is going to try sending the packet to, and the netif is the hardware/software (NIC card) it is going to use to transmit the packet.
