PC AND LAPTOP BOTH ARE IN THE SAME VLAN 10 (10.1.1.0/24)
WHEREAS SERVER IS IN THE ANOTHER VLAN 20 (10.1.2.0/24)
SW1 is a Layer 3 Switch
SW2 , SW3 AND SW4 are Layer 2 Switches
Issue :-
=================
PC not able to ping laptop and vice versa
SW2#sh int status
Port Name Status Vlan Duplex Speed Type
Fa0/1 connected 1 auto auto 10/100BaseTX
Fa0/2 connected 1 auto auto 10/100BaseTX
From PC
FastEthernet0 Connection:(default port)
Link-local IPv6 Address.........: FE80::201:64FF:FE0C:9609
IP Address......................: 10.1.1.2
Subnet Mask.....................: 255.255.255.0
Default Gateway.................: 10.1.1.1
Let try to ping the laptop
C:\>ping 10.1.1.3
Pinging 10.1.1.3 with 32 bytes of data:
Request timed out.
Request timed out.
Request timed out.
Request timed out.
Ping statistics for 10.1.1.3:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),
interface FastEthernet0/2
switchport access vlan 10
switchport mode access
SW2#sh vlan brief
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active Fa0/3, Fa0/4, Fa0/5, Fa0/6
Fa0/7, Fa0/8, Fa0/9, Fa0/10
Fa0/11, Fa0/12, Fa0/13, Fa0/14
Fa0/15, Fa0/16, Fa0/17, Fa0/18
Fa0/19, Fa0/20, Fa0/21, Fa0/22
Fa0/23, Fa0/24, Gig0/1, Gig0/2
1002 fddi-default active
1003 token-ring-default active
1004 fddinet-default active
1005 trnet-default active
SW2#
NO L2 VLAN 10 IS CREATED
LETS CREATE VLAN 10
SW2#config
Configuring from terminal, memory, or network [terminal]?
Enter configuration commands, one per line. End with CNTL/Z.
SW2(config)#vlan 10
SW2(config-vlan)#^Z
SW2#
%SYS-5-CONFIG_I: Configured from console by console
SW2#
SW2#sh vlan brief
VLAN Name Status Ports
---- -------------------------------- --------- -------------------------------
1 default active Fa0/3, Fa0/4, Fa0/5, Fa0/6
Fa0/7, Fa0/8, Fa0/9, Fa0/10
Fa0/11, Fa0/12, Fa0/13, Fa0/14
Fa0/15, Fa0/16, Fa0/17, Fa0/18
Fa0/19, Fa0/20, Fa0/21, Fa0/22
Fa0/23, Fa0/24, Gig0/1, Gig0/2
10 VLAN0010 active Fa0/2
1002 fddi-default active
1003 token-ring-default active
1004 fddinet-default active
1005 trnet-default active
SW2#
But still not able to ping Laptop
C:\>ping 10.1.1.3
Pinging 10.1.1.3 with 32 bytes of data:
Request timed out.
Request timed out.
Request timed out.
Request timed out.
Ping statistics for 10.1.1.3:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),
Lets check on switch 4
SW4#sh int status
Port Name Status Vlan Duplex Speed Type
Fa0/1 err-disabled 1 auto auto 10/100BaseTX
Fa0/2 connected 10 auto auto 10/100BaseTX
We can see the trunk interface Fa0/1 is in err-disabled
SW4(config)#int fa0/1
SW4(config-if)#sh
%LINK-5-CHANGED: Interface FastEthernet0/1, changed state to administratively down
SW4(config-if)#no sh
SW4(config-if)#
%LINK-5-CHANGED: Interface FastEthernet0/1, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to up
%SPANTREE-2-BLOCK_BPDUGUARD: Received BPDU on port FastEthernet0/1 with BPDU Guard enabled. Disabling port.
%PM-4-ERR_DISABLE: bpduguard error detected on 0/1, putting 0/1 in err-disable state
%LINK-5-CHANGED: Interface FastEthernet0/1, changed state to administratively down
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to down
On interface Fa0/1 which is a trunk port BPDU guard is enable which makes it disabled
SW4#sh spanning-tree interface fa0/1
no spanning tree info available for FastEthernet0/1
interface FastEthernet0/1
switchport mode trunk
spanning-tree bpduguard enable
SW4(config)#int fa0/1
SW4(config-if)#spanning-tree bpduguard ?
disable Disable BPDU guard for this interface
enable Enable BPDU guard for this interface
SW4(config-if)#spanning-tree bpduguard disable
SW4(config-if)#^Z
SW4#
SW4(config)#int fa0/1
SW4(config-if)#shut
%LINK-5-CHANGED: Interface FastEthernet0/1, changed state to administratively down
SW4(config-if)#no shut
SW4(config-if)#
%LINK-5-CHANGED: Interface FastEthernet0/1, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to up
SW4(config-if)#^Z
SW4#
%SYS-5-CONFIG_I: Configured from console by console
SW4#sh spanning-tree interface fa0/1
Vlan Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
VLAN0001 Altn LSN 19 128.1 P2p
VLAN0010 Altn LSN 19 128.1 P2p
NOW LETS PING PC TO Laptop
C:\>ping 10.1.1.3
Pinging 10.1.1.3 with 32 bytes of data:
Reply from 10.1.1.3: bytes=32 time=11ms TTL=128
Reply from 10.1.1.3: bytes=32 time<1ms TTL=128
Reply from 10.1.1.3: bytes=32 time=1ms TTL=128
Reply from 10.1.1.3: bytes=32 time<1ms TTL=128
Ping statistics for 10.1.1.3:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 11ms, Average = 3ms
Thanks For Reading !!!!
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