1.dns port number udp 53
2.xmind Download
3. Floating routing
4. The secondary address can only passively access, use the main address priority access
5. Route summary
6. Dynamic routing protocol
There are 6.1 class routing protocol: do not carry mask when sending
6.1.1 Dynamic rip ports 520 multicast address 224.0.0.9
6.1.2 rip manually specify unicast or passive interface eth default:. 1 prohibited outwardly outgoing multicast routing updates, routing updates riip acceptable 2, 3 can be sent using thin update mode.
6.1.3 Split Horizon: receiving from one interface to route no longer sent out from the interface no ip split-horizon rip off by default as eigrp plus closed eigrp
Anti-ring mechanism rip: split horizon and poison reverse maximum number of hops (sent 2-3 times) triggered updates
rip timer: update time: 30s aging time: 180s flush: 240s
rip management from the 120 maximum number of hops 16 hops considered infinite
RIP is sent to the metric value of +1 when it is received EIGRP and ospf metric value came in +1
rip offset list offset-list: increasing the number of hops in the original Metric (only in the distance vector routing protocol) the maximum caution
Summary rip: 1 for specific routes summarized in the outlet direction, 2.rip null0 automatically generated does not have anti-loop function at Summary
rip next-hop characteristics: 1 for path optimization for accessing multiple networks in the next hop 2.next-hop = 0.0.0.0 the route update data to update the road source address, 3.net-hop = specific address for the next hop address
Automatic rip Summary: automatically aggregated when crossing major network; automatic summary is not the same when the major network; rip manner regardless of routes incoming long above satisfies two conditions are automatically aggregated
6.2 Classless Routing Protocol: sending mask carrying
7.gns3 installation
eigrp
Neighbor establishment condition: ip 1 packet source address and may communicate the received address, the same number 2.as, 3.k must be the same Note: HOLD time and time can be different hello
The term: 1.fd apparatus of the present value of the metric values to the destination network segment, 2.ad neighbor metric values to the destination network segment, 3.ad <fd minimum value can enter the topology table eigrp