Ok gentlemen/ladies -
I shall present the case of why can't host A ping Host B. It's a mystery novel,
starring myself!
This is really a ccna/ccnp type problem but I have done this many times before,
and it's always worked.....until today. I was simply just running through the
blue print, and configuring the basics. I wanted to make sure I could whip out
a config in seconds or minutes. Well I have done this before so I am wondering
maybe I just need a rest?
Topology is dead simple. Cat 1 int fa0/11 goes to A and Fa0/12 goes to B.
Host A is in VLAN 11
Host B is in VLAN 12.
Host A and B are PC's.
Host A ip add is 11.11.11.11/24
default gateway is 11.11.11.1 (The address of int vlan 11)
Host B ip add is 12.12.12.12/24
default gateway is 12.12.12.1 (The address of int vlan 12)
The topology, again super easy simple (with a side of OMG!)
CAT1
| |
A B
Host A and Host B are both pointing to int vlan 11 and 12 respectively. Now, I
am going nuts! I did a wr erase on the cat 3550 and did a delete vlan.dat and
did a reload (saying NO I don't want to save). Out here in California we have a
saying "Seriously Dude, seriously" and that applies to here. Sooooooooooooooo
is there something I did wrong?
I mean hell I even went into packet tracer 5.2 and tested it out and it worked.
I called my friend and told him what I did he says it should work. I watched
CBT nuggets BCMSN series, did the same thing he did his works, mine doesn't.
Here's my steps from beginning to end. I put ip routing on there, I know people
forget - and I checked that. I went to cisco website, followed the example -
Ok, I give up what gives!
So here it is: (Show run results at very bottom)
Switch>en
Switch#conf t
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)#host CAT1
CAT1(config)#ip routing
CAT1(config)#int fa0/11
CAT1(config-if)#switch mode acc
CAT1(config-if)#switch acc vlan 11
% Access VLAN does not exist. Creating vlan 11
CAT1(config-if)#int vlan 11
%LINK-5-CHANGED: Interface Vlan11, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan11, changed state to
upCAT1(config-if)#ip add 11.11.11.1 255.255.255.0
CAT1(config-if)#int fa0/12
CAT1(config-if)#switch mode acc
CAT1(config-if)#switch acc vlan 12
% Access VLAN does not exist. Creating vlan 12
CAT1(config-if)#int vlan 12
%LINK-5-CHANGED: Interface Vlan12, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan12, changed state to up
CAT1(config-if)#ip add 12.12.12.1 255.255.255.0
CAT1(config-if)#end
CAT1#wr
After all that I verified with show int vlan 11, show int vlan 12 see they are
up/up and verified the ip addresses. I see the fa0/11 and 12 are up/up. I can
ping from Host A to int vlan 11 (11.11.11.1) AND to Int Vlan 12 (12.12.12.1)
but I cannot get to 12.12.12.12 from host A or to 11.11.11.11 from host B. So I
can ping default gateway from each host, but not into the subnets themselves on
the other vlan.
=====Show run results================
!
version 12.2
no service pad
service timestamps debug uptime
service timestamps log uptime
no service password-encryption
!
hostname CAT1
!
!
no aaa new-model
ip subnet-zero
ip routing
no ip domain-lookup
no file verify auto
spanning-tree mode pvst
spanning-tree extend system-id
!
vlan internal allocation policy ascending
!
!
interface FastEthernet0/1
switchport mode dynamic desirable
!
interface FastEthernet0/2
switchport mode dynamic desirable
!
interface FastEthernet0/3
switchport mode dynamic desirable
!
interface FastEthernet0/4
switchport mode dynamic desirable
!
interface FastEthernet0/5
switchport mode dynamic desirable
!
interface FastEthernet0/6
switchport mode dynamic desirable
!
interface FastEthernet0/7
switchport mode dynamic desirable
!
interface FastEthernet0/8
switchport mode dynamic desirable
!
interface FastEthernet0/9
switchport mode dynamic desirable
!
interface FastEthernet0/10
switchport mode dynamic desirable
!
interface FastEthernet0/11
switchport access vlan 11
switchport mode access
!
interface FastEthernet0/12
switchport access vlan 12
switchport mode access
!
interface FastEthernet0/13
switchport mode dynamic desirable
!
interface FastEthernet0/14
switchport mode dynamic desirable
!
interface FastEthernet0/15
switchport mode dynamic desirable
!
interface FastEthernet0/16
switchport mode dynamic desirable
!
interface FastEthernet0/17
switchport mode dynamic desirable
!
interface FastEthernet0/18
switchport mode dynamic desirable
!
interface FastEthernet0/19
switchport mode dynamic desirable
!
interface FastEthernet0/20
switchport mode dynamic desirable
!
interface FastEthernet0/21
switchport mode dynamic desirable
!
interface FastEthernet0/22
switchport mode dynamic desirable
!
interface FastEthernet0/23
switchport mode dynamic desirable
!
interface FastEthernet0/24
switchport mode dynamic desirable
!
interface GigabitEthernet0/1
switchport mode dynamic desirable
!
interface GigabitEthernet0/2
switchport mode dynamic desirable
!
interface Vlan1
no ip address
shutdown
!
interface Vlan11
ip address 11.11.11.1 255.255.255.0
!
interface Vlan12
ip address 12.12.12.1 255.255.255.0
!
ip classless
ip http server
ip http secure-server
!
!
!
control-plane
!
alias exec svb sh vlan brief
alias exec siib show ip int b
alias exec sir sh ip route
alias exec svs sh vtp stat
!
line con 0
exec-timeout 0 0
logging synchronous
line vty 0 4
exec-timeout 0 0
logging synchronous
login
line vty 5
exec-timeout 0 0
logging synchronous
no login
line vty 6 15
no login
!
!
end
So now you have the facts, how does the jury find me? CRAZY or not crazy :)
-Thanks a million - Nick
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