Jimsim Network Simulator Jimsim is an application that emulates several routers connected via virutal networks.
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network simulator network simulator virutal networks emulates routers Jimsim

Jimsim Network Simulator Description

Jimsim is an application that emulates several routers connected via virutal networks. Jimsim Network Simulator project can emulate several routers connected via virutal networks. You can connect to the routers with your own favorite telnet program.Connecting to the Virtual RoutersUse your favorite telnet program to connect to each of the virtual routers. For example: For router 1 type: C:>telnet localhost 10000 For router 2 type: C:>telnet localhost 10001 For router 3 type: C:>telnet localhost 10002Network LayoutCurrently the network is configured like this:access-list ip acccess-list ip access-groupshow access-listshow ip interfaceshow ip interface briefdebug interface encapsulation (serial interfaces only)bandwidthclock rate (serial interfaces)interface loopback0User commands: ? enable exit ping ip show cdp show cdp neigh show cdp neigh detail show interface show interface e0,eth0,etc show ip route show versionEnable commands: clear counters clear counters interface config terminal copy running startup copy startup running debug all debug ip routing debug ip eigrp debug cdp disable exit reload show run show startup show ip eigrp neighbors show ip eigrp topology traceroute ip undebug all undebug ip routing undebug ip eigrp undebug cdpConfig commands: cdp run enable password password end hostname banner motd delimiter banner exec delimiter banner login delimiter ip route network netmask dest interface e0,eth0,etc bandwidth value ip address addr netmask description cdp enable shutdown line con0, console0, console 0 login login local password passwd router eigrp number network a.b.c.d service password-encryption user username password passwordLimitations:· The EIGRP support is very basic. Just the network command for now. (Neighbors don't expire.) You can disable EIGRP with "no router eigrp process_id" · The routing table isn't 100% correct. It doesn't summarize subnets. Nor does it understand multiple routes to the same destination. This will be fixed in the next version. · Traceroute seems to count extra hops. It's counting each remote interface on a router as a hop. So, when you traceroute from router1 to router3, it counts router2 twice (once for 192.168.1.2 and 10.1.1.1)

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