Routing switch help guys I have no clue here

itdaddy

hey guys I am practicing some switch stuff for my SWITCH exam and not sure what is wrong.

here is my setup:

R1 to Sw1 fa0/5
R2 to Sw1 fa0/4

both fast 0/4 and 0/5
are have
switchport access vlan 10on the and both show up status with vlan 10 set
on sw1 I have
interface vlan 10
ip address 192.168.1.1 255.255.255.0

on R1 I have 192.168.1.2 255.255.255.0
on R2 I have 192.168.1.3 255.255.255.0


R1 can ping all ip addresses above
R2 cannot ping sw1 SVI 192.168.1.1
Sw1 cannot ping R2 192.168.1.3
but
R1 and R2 can ping each other

my question is why cant sw1 ping R2 and R2 ping sw1 SVI

I have tried both R1 and R2 with ip default-gateway 192.168.1.1
with ip routing off and on..I have no clue here. shouldn't
R2 be able to ping its gw? since all in the vlan 10?

networker050184

Yep it should work fine with the set up you have assuming it is all configured correctly. I'm guessing you mixed something up here though.

Verify VLAN membership.
Verify IP addresses are set correctly.
Ports up/up?

You get the gist.

EdTheLad

Are you sure you didn't config a /30 mask somewhere?
My advise would be to learn the foundations better. Your troubleshooting has involved the default-gateway and routing, all these devices share the same network. When configurations start to get more complicated you'll be in trouble if you cant pinpoint where the issue could be.

jeffgibbs

Have you set up any routing ? Wont you need routing for the intervlan communication to work correctly. I know not having routing turned on causes problems with things like ICMP pings and what not.... just a thought.

networker050184

No need for any routing here. Everything is on (or supposed to be on) a single subnet.

DCD

Can you put the output from a Show IP ARP and Show CDP Neighbors.

itdaddy

Here it is. I have even swamped R2 an R3 switch ports same
R3 can ping R2 fine but not its gw? huh? I don't get it.
see my config the masks right. I even tried another 1841
and it did the same thing a R3 but R2 can ping all? not sure I will try show arp
all 1841 have 15.1 ios.

R2

interface FastEthernet0/0
mac-address 0000.0000.0002
ip address 192.168.1.2 255.255.255.0
no ip route-cache
duplex auto
speed auto
!
interface FastEthernet0/1
no ip address
no ip route-cache
shutdown
duplex auto
speed auto
!
ip default-gateway 192.168.1.1
ip forward-protocol nd

R3
interface FastEthernet0/0
mac-address 0000.0000.0001
ip address 192.168.1.3 255.255.255.0
no ip route-cache
duplex auto
speed auto
!
interface FastEthernet0/1
no ip address
no ip route-cache
shutdown
duplex auto
speed auto
!
ip default-gateway 192.168.1.1
ip forward-protocol nd

Sw1

interface FastEthernet0/4
switchport access vlan 10
switchport mode access
spanning-tree portfast
!
interface FastEthernet0/5
switchport access vlan 10
switchport mode access
spanning-tree portfast
!
interface FastEthernet0/6
!
interface FastEthernet0/7
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface FastEthernet0/8
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface FastEthernet0/9
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface FastEthernet0/10
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface FastEthernet0/11
switchport trunk encapsulation dot1q
switchport mode trunk
!
interface FastEthernet0/12
switchport trunk encapsulation dot1q
switchport mode trunk

!
interface FastEthernet0/20
!
interface FastEthernet0/21

interface FastEthernet0/48
!
interface GigabitEthernet0/1
!

!
i
!
interface Vlan1
ip address 100.0.0.1 255.255.255.0
no ip route-cache
!
interface Vlan10
ip address 192.168.1.1 255.255.255.0
no ip route-cache

darkerz

"Show Interface x/x switchport"

itdaddy

here are he Show ARP what else am I missing. I am no using and routing protocols just straight vlan 10
switchport commands. no ip routing used.

both R2 and R3 are connected to
fast 0/4 and 0/5 and they show int status of vlan 10
man this is bugging me since i have 1 more router that i have
tried and i get same thing. I dont know? R3 should ping default-gateway 192.168.1.1
and sw1 should ping 192.168.1.3 since they are in same vlan? wtheck?


R2#show arp
Protocol Address Age (min) Hardware Addr Type Interface
Internet 192.168.1.1 2 001b.2bc0.ed41 ARPA FastEthernet0/0
Internet 192.168.1.2 - 0000.0000.0002 ARPA FastEthernet0/0
Internet 192.168.1.3 0 0000.0000.0001 ARPA FastEthernet0/0
R2#


R3#show arp
Protocol Address Age (min) Hardware Addr Type Interface
Internet 192.168.1.2 1 0000.0000.0002 ARPA FastEthernet0/0
Internet 192.168.1.3 - 0000.0000.0001 ARPA FastEthernet0/0
R3#ping 192.168.1.1

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.1, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
R3#
SW1#show arp
Protocol Address Age (min) Hardware Addr Type Interface
Internet 100.0.0.1 - 001b.2bc0.ed40 ARPA Vlan1
Internet 192.168.1.1 - 001b.2bc0.ed41 ARPA Vlan10
Internet 192.168.1.2 0 0000.0000.0002 ARPA Vlan10
SW1#ping 192.168.1.3
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.3, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
SW1#

FrankGuthrie

How are you testing this?

in GNS3, Packet Tracer, Real hardware?

itdaddy

ports are all up since I can ping from R2 to R3 fine thru sw1 both fast 04 and 05..i just cant understand why
R3 cannot ping SVI its own gw and Sw1 cant ping R3 but R2 and R3 can hit each other. seems simple setup but weird
with 2 routers ?

FrankGuthrie

Did you try debugging?

itdaddy

hmmmm encap failed. why? I have switchports acces vlan10? all direct to vlan via fst 0/4 and 0/5??

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.3, timeout is 2 seconds:

01:51:19: IP: s=192.168.1.1 (local), d=192.168.1.3 (Vlan10), len 100, sending
01:51:19: IP: s=192.168.1.1 (local), d=192.168.1.3 (Vlan10), len 100, encapsulation failed.
01:51:21: IP: s=192.168.1.1 (local), d=192.168.1.3 (Vlan10), len 100, sending
01:51:21: IP: s=192.168.1.1 (local), d=192.168.1.3 (Vlan10), len 100, encapsulation failed.
01:51:23: IP: s=192.168.1.1 (local), d=192.168.1.3 (Vlan10), len 100, sending
01:51:23: IP: s=192.168.1.1 (local), d=192.168.1.3 (Vlan10), len 100, encapsulation failed.
01:51:25: IP: s=192.168.1.1 (local), d=192.168.1.3 (Vlan10), len 100, sending
01:51:25: IP: s=192.168.1.1 (local), d=192.168.1.3 (Vlan10), len 100, encapsulation failed.
01:51:27: IP: s=192.168.1.1 (local), d=192.168.1.3 (Vlan10), len 100, sending
01:51:27: IP: s=192.168.1.1 (local), d=192.168.1.3 (Vlan10), len 100, encapsulation failed.
Success rate is 0 percent (0/5)

IP packet debugging is on
R3#ping 192.168.1.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.1.1, timeout is 2 seconds:
*Dec 31 02:49:22.031: IP: tableid=0, s=192.168.1.3 (local), d=192.168.1.1 (FastEthernet0/0), routed via RIB
*Dec 31 02:49:22.031: IP: s=192.168.1.3 (local), d=192.168.1.1 (FastEthernet0/0), len 100, sending
*Dec 31 02:49:22.031: IP: s=192.168.1.3 (local), d=192.168.1.1 (FastEthernet0/0), len 100, sending full packet.
*Dec 31 02:49:24.031: IP: tableid=0, s=192.168.1.3 (local), d=192.168.1.1 (FastEthernet0/0), routed via RIB
*Dec 31 02:49:24.031: IP: s=192.168.1.3 (local), d=192.168.1.1 (FastEthernet0/0), len 100, sending
*Dec 31 02:49:24.031: IP: s=192.168.1.3 (local), d=192.168.1.1 (FastEthernet0/0), len 100, sending full packet.
*Dec 31 02:49:26.031: IP: tableid=0, s=192.168.1.3 (local), d=192.168.1.1 (FastEthernet0/0), routed via RIB
*Dec 31 02:49:26.031: IP: s=192.168.1.3 (local), d=192.168.1.1 (FastEthernet0/0), len 100, sending
*Dec 31 02:49:26.031: IP: s=192.168.1.3 (local), d=192.168.1.1 (FastEthernet0/0), len 100, sending full packet.
*Dec 31 02:49:28.031: IP: tableid=0, s=192.168.1.3 (local), d=192.168.1.1 (FastEthernet0/0), routed via RIB
*Dec 31 02:49:28.031: IP: s=192.168.1.3 (local), d=192.168.1.1 (FastEthernet0/0), len 100, sending
*Dec 31 02:49:28.031: IP: s=192.168.1.3 (local), d=192.168.1.1 (FastEthernet0/0), len 100, sending full packet.
*Dec 31 02:49:30.031: IP: tableid=0, s=192.168.1.3 (local), d=192.168.1.1 (FastEthernet0/0), routed via RIB
*Dec 31 02:49:30.031: IP: s=192.168.1.3 (local), d=192.168.1.1 (FastEthernet0/0), len 100, sending
*Dec 31 02:49:30.031: IP: s=192.168.1.3 (local), d=192.168.1.1 (FastEthernet0/0), len 100, sending full packet.
Success rate is 0 percent (0/5)
R3#

like what debug command? I mean I do a arp and shows nothing?

FrankGuthrie

You never answered my previous question. Is this real hardware, GNS3, Packet Tracer... What type of cabling are you using? Did you use straigth through?

itdaddy

$$$$$$$$$$$$$$$ Solved $$$$$$$$$$$$$$$$$$

I changed the macs on interfaces like INE did and then I noticed this? debug arp
and I had gut feeling to change macs and BAM worked like it should in theory. Sorry to trouble you guys
but it had some how mac duplicate. wow the ARP layer don't lie. thank you men! not sure why
but changed macs on my r3 and bam worked huh!

02:02:16: IP: s=192.168.1.1 (local), d=192.168.1.3 (Vlan10), len 100, encapsulation failed
02:02:16: IP ARP rep filtered src 192.168.1.3 0000.0000.0001, dst 192.168.1.1 001b.2bc0.ed41 it's our address.
02:02:18: IP: s=192.168.1.1 (local), d=192.168.1.3 (Vlan10), len 100, sending
02:02:18: IP ARP: sent req src 192.168.1.1 001b.2bc0.ed41,
dst 192.168.1.3 0000.0000.0000 Vlan10
02:02:18: IP: s=192.168.1.1 (local), d=192.168.1.3 (Vlan10), len 100, encapsulation failed
02:02:18: IP ARP rep filtered src 192.168.1.3 0000.0000.0001, dst 192.168.1.1 001b.2bc0.ed41 it's our address.
02:02:20: IP: s=192.168.1.1 (local), d=192.168.1.3 (Vlan10), len 100, sending
02:02:20: IP ARP: sent req src 192.168.1.1 001b.2bc0.ed41,
dst 192.168.1.3 0000.0000.0000 Vlan10