Router 2811 and C2960 Switch Trunking Problem

[sunriderhk]

Hi all

I got an problem with a trunking problem between Router 2811 and C2960 switch

In router 2811 - I created f0/0.1 10.65.20.1 (VLAN 1) and f0/0.48 10.65.23.1 (VLAN 48)

In C2960 - Vlan 1 10.65.20.30 , VLAN 48 10.65.23.30

Finally I can only ping VLAN 1 IP but fail to ping VLAN 48 IP, can help me how to troubleshoot it?

Hugo

Router 2811 Configuration:

interface FastEthernet0/0.1
 encapsulation dot1Q 1 native
 ip address 10.65.20.1 255.255.255.0
!
interface FastEthernet0/0.48
 encapsulation dot1Q 48
 ip address 10.65.23.1 255.255.255.0

C2960 Configuration:

interface FastEthernet0/24
 switchport mode trunk

[Peter Paluch]

Hugo,

Besides creating interface Vlan 48 on your Catalyst 2960, did you also create the vlan 48 itself? This sounds like the VLAN 48 was not created and so the interface Vlan 48 was inoperable.

Best regards,
Peter

[Jon Marshall]

Well I think we have covered everything between us :-)

Jon

[Peter Paluch]

Jon,

LOL, yes indeed :)

Best regards,
Peter

P.S.: It is so good to see you here again!

[sunriderhk]

2960_24#sh ip int br
Interface              IP-Address      OK? Method Status                Protocol
Vlan1                  10.65.20.31     YES NVRAM  up                    up      
Vlan48                 10.65.23.31     YES NVRAM  up                    up      

[Jon Marshall]

Ping from where ie. what device and what IP does it have ?

Have you set the default gateway on the client correctly ?

Can you post a "sh int trunk" from the switch.

Jon

[sunriderhk]

2811#sh vlans

Virtual LAN ID:  1 (IEEE 802.1Q Encapsulation)

   vLAN Trunk Interface:   FastEthernet0/0.1

 This is configured as native Vlan for the following interface(s) :
FastEthernet0/0

   Protocols Configured:   Address:              Received:        Transmitted:
           IP              10.65.20.1              388873              262275
        Other                                           0                1723

   390760 packets, 71854310 bytes input
   263998 packets, 53723195 bytes output

Virtual LAN ID:  48 (IEEE 802.1Q Encapsulation)

   vLAN Trunk Interface:   FastEthernet0/0.48

   Protocols Configured:   Address:              Received:        Transmitted:
           IP              10.65.23.1                   0                   0
        Other                                           0                  20

   0 packets, 0 bytes input
   20 packets, 1883 bytes output

2960_24#sh int trunk

Port        Mode             Encapsulation  Status        Native vlan
Fa0/24      on               802.1q         trunking      1
Gi0/1       on               802.1q         trunking      1

Port        Vlans allowed on trunk
Fa0/24      1-4094
Gi0/1       1-4094

Port        Vlans allowed and active in management domain
Fa0/24      1,48
Gi0/1       1,48

Port        Vlans in spanning tree forwarding state and not pruned
Fa0/24      1,48
Gi0/1       1,48

[sunriderhk]

Ping from 2960 to 2811 (VLAN 1)

2960_24#ping 10.65.20.1

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.65.20.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/8 ms

Ping from 2960 to 2811 (VLAN 48)

2960_24#ping 10.65.23.1

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.65.23.1, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)

Ping from 2960 to 2811 (VLAN 48)

2960_24#ping 10.65.23.1 source vlan 48

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.65.23.1, timeout is 2 seconds:
Packet sent with a source address of 10.65.23.31 
.....
Success rate is 0 percent (0/5)

Ping from 2811 to 2960 (VLAN 1)

2811#ping 10.65.20.31

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.65.20.31, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms

Ping from 2811 to 2960 (VLAN 48)

2811#ping 10.65.23.31

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.65.23.31, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)

Ping from 2811 to 2960 (VLAN 48)

2811#ping 10.65.23.31 source f0/0.48

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.65.23.31, timeout is 2 seconds:
Packet sent with a source address of 10.65.23.1 
.....
Success rate is 0 percent (0/5)

[Jon Marshall]

Is the switch only meant to be L2 ie. no L3 routing between vlans ?

If so pick one of the vlans on the switch and then shutdown the other vlan interface.

Then add this to your switch -

"ip default-gateway x.x.x.x"

where x.x.x.x is the router IP address assigned to interface for the vlan that you still have up on your switch.

Jon

[sunriderhk]

2960_24#sh run | inc gateway
ip default-gateway 10.65.20.1

[Jon Marshall]

Can you shutdown the vlan interface for vlan 48 on the switch and then try pinging from the switch to 10.65.23.1 on the router.

Jon

[sunriderhk]

Tried but failure

[Jon Marshall]

Can you post the output of "sh ip route" from the switch.

Jon

[sunriderhk]

No "sh ip route" for 2960

2960_24#sh ip ?
  access-lists  List IP access lists
  accounting    The active IP accounting database
  admission     Network Admission Control information
  aliases       IP alias table
  arp           IP ARP table
  auth-proxy    Authentication Proxy information
  device        Show IP Tracking Hosts
  dhcp          Show items in the DHCP database
  host          IP host information
  http          HTTP information
  igmp          IGMP information
  interface     IP interface status and configuration
  local         IP local options
  nat           IP NAT information
  port-map      Port to Application Mapping (PAM) information
  redirects     IP redirects
  sla           Service Level Agreement (SLA)
  sockets       Open IP sockets
  source        IP source
  ssh           Information on SSH
  traffic       IP protocol statistics
  verify        Ip verify

[Jon Marshall]

Did you see my last post ie. don't shutdown the interface then bring it back up, leave it shutdown.

Jon