RE: simple problem

From: Tony Schaffran (groupstudy@cconlinelabs.com)
Date: Fri Mar 09 2007 - 14:11:37 ART


Now, your original post showed R2 fa1/0 as:

interface FastEthernet0/1
 ip address 20.1.23.2 255.255.255.0
 duplex auto
 speed auto
 !

And now, your config shows R2 fa1/0 as:

interface FastEthernet1/0
 ip address 20.1.24.2 255.255.255.0
 duplex auto
 speed auto
!

I can see how your original post would have been a problem because you had
the wrong IP address on the wrong Interface.

Which one is it? Can you paste the complete current config for R2 and SW1?
Have you rebooted after your config change? Could be a hung ARP cache
issue.

Tony Schaffran
Network Analyst
CCIE #11071
CCNP, CCNA, CCDA,
NNCDS, NNCSS, CNE, MCSE
 
www.cconlinelabs.com
Your #1 choice for online Cisco rack rentals.
 

-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Edward Norton
Sent: Friday, March 09, 2007 7:47 AM
To: Sasa Milic; ccielab@groupstudy.com
Subject: Re: simple problem

Sorry guys ..the router has two interfaces and i posted the wrong one , the
problem remains ....please check the shows below ..the second port ( the
concerned one ) is on vlan 7 ..the port is up and im not able to ping vlan
7 on the switch ( pingable from other router) .
   
  is this a hardware issue ??
   
   
   
  R2 is connected to the switch on port 2 and port 8
   
   
  !
interface FastEthernet0/2
 description To R2
 switchport access vlan 3
 switchport mode access
!
!
interface FastEthernet0/8
 description To R2-port2
 switchport access vlan 7
 switchport mode access
!
   
  SW1#show cdp nei
Capability Codes: R - Router, T - Trans Bridge, B - Source Route Bridge
                  S - Switch, H - Host, I - IGMP, r - Repeater, P - Phone
  Device ID Local Intrfce Holdtme Capability
Platform Po
rt ID
BB2-FRSW Fas 0/14 154 R 2522
Eth
0
BB1-TS Fas 0/13 149 R 2509
Eth
0
R2 Fas 0/8 144 R 3620
Fas
1/1
R2 Fas 0/2 143 R 3620
Fas
1/0

   
  on the router
   
  !
!
interface FastEthernet1/0
 ip address 20.1.24.2 255.255.255.0
 duplex auto
 speed auto
!
interface FastEthernet1/1
 ip address 20.1.23.2 255.255.255.0
 duplex auto
 speed auto
!

   
   
  
 
   
   
  

----- Original Message -----
From: "Edward Norton"
To: "Muizebelt Danny" ;
Sent: Friday, March 09, 2007 3:43 PM
Subject: RE: simple problem

>I have checked all what you mentioned ...and the other post too
>
> 1-the router is connected to the correct vlan , according to show vlan
> and show interface status on the switch
>
> 2- the vlan is created properly , there is another router on the same
> vlan able to ping the switch (.8) successfully
>
>
> when i did show arp ..i can see the entry showing incomplete
>
> R2#show arp
> Protocol Address Age (min) Hardware Addr Type Interface
> Internet 20.1.23.2 - 0010.7b04.8712 ARPA
> FastEthernet1/1
> Internet 20.1.23.8 0 Incomplete ARPA
>
>
>
> here is some switch shows
>
> VLAN Name Status Ports
> ---- -------------------------------- ---------
-------------------------------
> 1 default active Fa0/10, Fa0/11, Fa0/12,
> Fa0/15
> Fa0/21, Gi0/1, Gi0/2
> 6 Vlan_r6 active
> 7 vlan_r2r3 active Fa0/3, Fa0/8
>
> show run on the switch
>
>
> !
> interface FastEthernet0/2
> description To R2
> switchport access vlan 3
> switchport mode access
> !
> !
> interface Vlan7
> ip address 20.1.23.8 255.255.255.0
> !
>
>
>
>
> can this be a hardware problem on my router ??
>
>
>
>
>
> Muizebelt Danny wrote:
> You have a L3-->L2 mapping problem. In other words, your L3 to L2 address
> mapping table is not correctly filled out, it's your ARP table.
>
> So now you have to figure out why the 20.1.23.8 address does not get
> resolved correctly. Line protocol on the router is up else he wouldn't try

> to send it out to the switch so now we have the following possible
> problems:
>
> - the 3620 is not connected to the correct vlan.
> - check if the port is in access mode
> - check if the vlan in up/up
> - And finally (this is my guess) the vlan you use is not defined in the
> vlan database
>
> Let me know what it was.
>
> -Danny
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Edward Norton
> Sent: Freitag, 09. Mdrz 2007 14:19
> To: ccielab@groupstudy.com
> Subject: simple problem
>
> guys
> .a router (3620) connected to switch and im trying to ping from the router

> to the switch vlan interface , for some unknown reason .. ping is not
> successful ...configuration on the router is very simple as
> !
> interface FastEthernet0/1
> ip address 20.1.23.2 255.255.255.0
> duplex auto
> speed auto
> !
>
> on the switch
> !
> interface Vlan7
> ip address 20.1.23.8 255.255.255.0
> !
>
> interfaces are UP ...vlan is configured properly .
>
> when i did debug to see why it is not pinging ..i got an encasultion
> failure ..routed via RIB ...wat is that ???
>
>
> *Mar 1 00:17:35.207: IP: s=20.1.23.2 (local), d=20.1.23.8
> (FastEthernet0/1), le
> n 100, encapsulation failed
> *Mar 1 00:17:35.207: ICMP type=8, code=0.
> *Mar 1 00:17:37.207: IP: tableid=0, s=20.1.23.2 (local), d=20.1.23.8
> (FastEther
> net0/1), routed via RIB
> *Mar 1 00:17:37.207: IP: s=20.1.23.2 (local), d=20.1.23.8
> (FastEthernet0/1), le
> n 100, sending
> *Mar 1 00:17:37.207: ICMP type=8, code=0
> *Mar 1 00:17:37.207: IP: s=20.1.23.2 (local), d=20.1.23.8
> (FastEthernet0/1), le
> n 100, encapsulation failed
> *Mar 1 00:17:37.207: ICMP type=8, code=0.
> Success rate is 0 percent (0/5)
>
>
>
>
> any help is appreciated
>
>
> ReGaRdS
>
>
>
>
>
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