Connecting

Connect to the lab server:

local$ ssh-keygen -R netlab.nanocat.net
local$ ssh lab@netlab.nanocat.net
Password: (see discord)

Connect to your router:

lab@netlab$ list-routers                           <- list all lab routers
lab@netlab$ list-pcs                               <- list all lab PCs
lab@netlab$ docker exec -it clab-clintro-r7 Cli    <- connect to your router

Topology

Topology: a-tangled-web

Topology: a-tangled-web

Goal

• Configure all routers
• Enable dynamic routing with RIP
• All routers can reach all other routers

Steps (Bird’s-Eye View)

• Enable IP routing
• Configure your loopback interface
• Configure your ethernet interfaces
• Set up RIP

IP Routing

• Aristas are Layer 2 Switches by default
• Routing must be explicitly enabled

•   !
    ip routing
    !

Loopback interface

• Take your router number (eg r7)

• That number, repeated four times /32, is your loopback interface

•   !
    interface loopback1
       ip address 7.7.7.7/32
    !

Ethernet interface addressing concept

• Take your router number (eg r7)
• Take your neighbour’s router number (eg r9)
• Your interface address is 10.7.9.7/24
  • 10, dot
  • lower router number, dot
  • higher router number, dot
  • your router number /24
• EG link from r2:eth1 -> r5:eth5
  • r2 side: 10.2.5.1/24
  • r5 side: 10.2.5.5/24

Ethernet interfaces

!
interface ethernet2
   no switchport                            <- routed port
   description --- link to r8:eth10 ---     <- discover from diagram
                                               or using : show lldp neighbor
   ip address 10.4.8.4/24
!

Set up RIP

!
router rip
   no shutdown
   network 10.0.0.0/8
!

Experiment!

show ip route
traceroute 6.6.6.6
ping 10.10.10.10

Bonus: convert to OSPF

• If we make it this far:

•   !
    no router rip
    router ospf 100
       network 10.0.0.0/8 area 0
       redistribute connected
    !

michel - R3 roumen - R5 chris - R6 nick - R7 kim - R8 hans - R10 ryan - R11