GNS3 connecting router through telnet
JacobGates
Member Posts: 33 ■■□□□□□□□□
in CCNA & CCENT
Okay so I am studying on this site freeccnastudyguide.com and I have gotten to telnet and IOS 3-10 Using Telnet on IOS « Free CCNA Study Guide Free CCNA Study Guide
I have 2 3660 routers in GNS3 and they are connected via FastEthernet 0/0. If I do
I have set a password for both routers in vty and did
So I don't know if I didn't do something I was supposed to or if the study site didn't tell me something or what but for some reason telnet is not connecting. Anyone's help is great appreciated.
I have 2 3660 routers in GNS3 and they are connected via FastEthernet 0/0. If I do
show cdp entry *I can see the other router is connected. But when I follow the site's tutorial for telnet I get a
% Destination unreachable; gateway or host down
I have set a password for both routers in vty and did
transport input ssh telnetafter setting up a hostname, ip domain-name, and encrypting.
So I don't know if I didn't do something I was supposed to or if the study site didn't tell me something or what but for some reason telnet is not connecting. Anyone's help is great appreciated.
Comments
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Jon_Cisco
Member Posts: 1,772 ■■■■■■■■□□
Can you ping between the hosts?
Did you set up your vty lines to login and set a vty password? -
JacobGates
Member Posts: 33 ■■□□□□□□□□
Can you ping between the hosts?
Did you set up your vty lines to login and set a vty password?
I did set up the vty lines with password and login, but I thought I remembered pinging them before but I tried it just now and no, 0% success. -
JacobGates
Member Posts: 33 ■■□□□□□□□□
Okay I have two (hostname Anna and Jacob [me and my girlfriend]) so I have just wrapped them in two separate code wraps:martell1000 wrote: »paste you configs, so we can check.
Anna:!! version 12.4 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname Anna ! boot-start-marker boot-end-marker ! enable secret 5 $1$Mh4O$5F1/YPUeJ5kwAPD.Vkci31 enable password test ! no aaa new-model memory-size iomem 5 ! ! ip cef ip domain name test.edu ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! interface FastEthernet0/0 ip address 192.168.1.1 255.255.255.0 duplex auto speed auto ! interface FastEthernet0/1 no ip address shutdown duplex auto speed auto ! ! ip http server no ip http secure-server ! ! ! cdp timer 120 cdp holdtime 240 ! ! ! ! control-plane ! ! ! ! ! ! ! ! banner motd Testing banner ***** ! line con 0 password test login line aux 0 password test login line vty 0 4 password test login transport input telnet ssh line vty 5 1276 password test login transport input telnet ssh ! ! end
Jacob:!! version 12.4 service timestamps debug datetime msec service timestamps log datetime msec no service password-encryption ! hostname Jacob ! boot-start-marker boot-end-marker ! enable secret 5 $1$hWA2$FumWoUgYk95RbiNFFZon.. enable password test ! no aaa new-model memory-size iomem 5 ! ! ip cef ip domain name jacob.edu ip host Jacob 192.168.2.1 no ip dhcp use vrf connected ip dhcp excluded-address 192.168.2.1 ! ip dhcp pool test network 192.168.2.0 255.255.255.0 default-router 192.168.2.1 ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! ! interface FastEthernet0/0 ip address 192.168.2.1 255.255.255.0 duplex auto speed auto ! interface FastEthernet0/1 no ip address shutdown duplex auto speed auto ! ! ip http server no ip http secure-server ! ! ! cdp timer 120 cdp holdtime 240 ! ! ! ! control-plane ! ! ! ! ! ! ! ! banner login Welcome to Jacob. banner motd Welcome, please log in. ! line con 0 password test login line aux 0 line vty 0 4 password test login transport input telnet ssh line vty 5 1276 password test login transport input telnet ssh ! ! end
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EdTheLad
Member Posts: 2,111 ■■■■□□□□□□
Connected fast ethernet interfaces are not in the same subnet!Networking, sometimes i love it, mostly i hate it.Its all about the $$$$ -
JacobGates
Member Posts: 33 ■■□□□□□□□□
so wait... even though they are two different routers they have to be in the same subnet? so one router's fast ethernet should be 192.168.1.x and the other routers fast ethernet should be 192.168.1.y?Connected fast ethernet interfaces are not in the same subnet!
edit: Okay so I did what I described above (Anna set to 192.168.1.1 and Jacob set to 192.168.1.2) and it worked. Both ping and telnet. But now I have a new question. Why do both have to be in the same subnet? What if I wanted to ping and telnet across subnets. Why can I ping from my computer to another server across the world? Of course they are not in the same subnet. -
davenull
Member Posts: 173 ■■■□□□□□□□
Think of subnet as a country and router as its border. You tried to put 2 countries within the same border.
You can ping a server across the world because routers along the way were configured to know the path. By default, routers wouldn't know how to reach it. -
JacobGates
Member Posts: 33 ■■□□□□□□□□
Oh okay, so I am assuming I will learn later how to configure the routers to know the paths later so I can ping outside subnets, right? Just for now I need to stick to the same subnet.Think of subnet as a country and router as its border. You tried to put 2 countries within the same border.
You can ping a server across the world because routers along the way were configured to know the path. By default, routers wouldn't know how to reach it. -
davenull
Member Posts: 173 ■■■□□□□□□□
Yes, later you'll get to static routing and then routing protocols. For now, just remember that every interface on a router is a separate network, however, if 2 routers are directly connected the subnets on both interfaces have to be the same.
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JacobGates
Member Posts: 33 ■■□□□□□□□□
Okay! great, thank you so much for your help. Whew, one more step closer.Yes, later you'll get to static routing and then routing protocols. For now, just remember that every interface on a router is a separate network, however, if 2 routers are directly connected the subnets on both interfaces have to be the same. -
davenull
Member Posts: 173 ■■■□□□□□□□
No problem! I'd also recommend reviewing what broadcast domain is, because that's what the 'country' analogy is about.
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JacobGates
Member Posts: 33 ■■□□□□□□□□
Oh yeah I remember broadcast domain. So all these routers in the same subnet are now in the same broadcast domain then? I guess I'm still working on putting all this information together in my head.No problem! I'd also recommend reviewing what broadcast domain is, because that's what the 'country' analogy is about. -
davenull
Member Posts: 173 ■■■□□□□□□□
Not really, a router itself can't belong to a broadcast domain, just like a border doesn't belong to either country. However, a router's interface can and does belong to a broadcast domain. An router's interface is where the broadcast domain ends, so to say.
Think of space between routers as a broadcast domain that has to have the same subnet, while the router itself being just a border device. -
JacobGates
Member Posts: 33 ■■□□□□□□□□
Okay, I think I understand. This is all new to me so I will just do a lot of labs until I can be sure I understand it completely.Not really, a router itself can't belong to a broadcast domain, just like a border doesn't belong to either country. However, a router's interface can and does belong to a broadcast domain. An router's interface is where the broadcast domain ends, so to say.
Think of space between routers as a broadcast domain that has to have the same subnet, while the router itself being just a border device.
