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Posts tagged GNS3
OSPF Lab #2 Tasks
May 19th
This is the second OSPF post I’ll be doing for CCIE lab preparation. Today I’m posting the tasks, then tomorrow or the day after (or possibly after the weekend, depending how busy I am) I’ll post the walkthrough. If any of you work on this before the walkthrough, leave a comment.
Here’s the topology:
(Click image for fullsize)
Click here for the initial configs
Here are the tasks:
1. Configure R1, R2 and R3′s S0/0 interfaces in Area 0. Ensure that DR and BDR are elected. Advertise all loopback0s on all routers into OSPF.
2. Configure R1 as the default gateway for all OSPF routers. Do not use the “default-information” command.
3. Configure R6 to use the path through R4 to get to area 0 Do not use any interface level commands to accomplish this.
4. Configure R4 to filter any type 3, 4, 5 and 7 LSAs from entering area 45.
OSPF Lab #1 Walkthrough
May 13th
This is the walkthrough for OSPF Lab #1.
Here’s the topology:
Click here for the initial configs
Here is task one:
1. Configure R1′s s0/0.102 interface and R2′s s0/0.201 interface in area 12, this area should not receive any Type 5 LSAs. Configure R1′s s0/0.103 interface and R3′s s0/0.301 interface in area 13, R1 should only receive a default route from R3, no other OSPF routes should be in R1′s RIB (from R3). Do not use network statements to accomplish this task.
Config:
R1(config)#interface Serial0/0.102 point-to-point R1(config-subif)#ip ospf 100 area 12 R1(config-subif)# R1(config-subif)#interface Serial0/0.103 point-to-point R1(config-subif)#ip ospf 100 area 13 R1(config-subif)# R1(config-subif)#router ospf 100 R1(config-router)#area 12 stub R1(config-router)#area 13 stub R2(config)#interface Serial0/0.201 point-to-point R2(config-subif)#ip ospf 100 area 12 R2(config-subif)# R2(config-subif)#router ospf 100 R2(config-router)#area 12 stub R3(config)#interface Serial0/0.301 point-to-point R3(config-subif)#ip ospf 100 area 13 R3(config-subif)# R3(config-subif)#router ospf 100 R3(config-router)#area 13 stub no-summary |
Here we configure OSPF 100 under the routers’ interfaces (avoiding network statements). Then we configure R1 and R2′s link/area as a stub. Last we configure R1 and R3′s link/area as a totally stubby area, preventing R3 from sending anything buy a default route to R1.
OSPF Lab #1 Tasks
May 12th
This is the first OSPF post I’ll be doing for CCIE lab preparation. Sorry guys, I’ve been slacking with updates. Today I’m posting the tasks, then tomorrow or the day after I’ll post the walkthrough. If any of you work on this before the walkthrough, leave a comment.
Here’s the topology:
Click here for the initial configs
Here are the tasks:
1. Configure R1′s s0/0.102 interface and R2′s s0/0.201 interface in area 12, this area should not receive any Type 5 LSAs. Configure R1′s s0/0.103 interface and R3′s s0/0.301 interface in area 13, R1 should only receive a default route from R3, no other OSPF routes should be in R1′s RIB (from R3). Do not use network statements to accomplish this task.
EIGRP Lab #1
May 3rd
This is the first EIGRP post I’ll be doing for CCIE lab preparation.
I’ve tried to include a lot in this one without making it too long. Here’s the topology:
Click here for the initial configs
Here is task one:
1. Advertise all connected loopbacks into EIGRP AS 100. Ensure that only interfaces connected to other routers will form adjacencies. Do not allow EIGRP to summarize automatically.
Simple stuff:
R1(config)#router eigrp 100 R1(config-router)#passive-interface default R1(config-router)#no passive-interface Virtual-Template12 R1(config-router)#no passive-interface Virtual-Template13 R1(config-router)#network 1.0.0.0 R1(config-router)#network 10.0.0.0 R1(config-router)#no auto-summary R1(config)#interface Virtual-Template12 R1(config-if)#ip address 10.1.12.1 255.255.255.0 R1(config-if)# R1(config-if)#interface Virtual-Template13 R1(config-if)#ip address 10.1.13.1 255.255.255.0 R1(config-if)# R1(config-if)#interface Serial0/0.102 point-to-point R1(config-subif)#frame-relay interface-dlci 102 ppp Virtual-Template12 R1(config-subif)# R1(config-fr-dlci)#interface Serial0/0.103 point-to-point R1(config-subif)# frame-relay interface-dlci 103 ppp Virtual-Template13 |
This EIGRP config is basic, we’ve started the EIGRP 100 process, added our passive interface and network statements. We also disable auto-summarization. I’m only showing R1 here as the config is nearly identical across the board. We’ve also configured PPP on the FR links with Virtual Templates, this will be needed later in the config (leak maps).
RIP Lab #2
Apr 30th
This is the second and last RIP post I’ll be doing to prepare for the CCIE.
I’ve tried to include a lot in this one without making it too long. Here’s the topology:
(Click image for fullsize)
Click here for the initial configs
Here is task one:
1. Configure RIPv2 on all routers and advertise their directly connected interfaces. Ensure that these routers have full NLRI to all the loopback interfaces advertised into RIP. Ensure that all routers can ping all loopbacks. Configure RIP not to advertise on any interface by default.
Let’s go through the config:
R1(config)#router rip R1(config-router)# version 2 R1(config-router)# no auto-summary R1(config-router)# network 1.0.0.0 R1(config-router)# network 10.0.0.0 R1(config-router)# passive-interface default R1(config-router)# no passive-interface Serial0/0.102 R1(config-router)# no passive-interface Serial0/0.103 |
I’m only showing R1 here as the other routers will be nearly identical. First we enable RIP, configure the version, turn of auto-summary and configure our network statements. Then we use the “passive-interface default” command, which tells RIP that all interfaces are passive unless explicity configured otherwise. Last we configure the configure s0/0.102 and s0/0.103 NOT to be passive.
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