06-30-2010 08:49 AM - edited 03-06-2019 11:50 AM
I can't ping 10.10.10.1 from my laptop, am I doing something wrong?
Used: Cisco 3550
Ports used: Fa0/46 è access port with VLAN 4000
Fa0/47 è router port with IP 10.10.10.1/24
Fa0/48 è access port with VLAN 4000
Procedure:
1- Built Fa0/46 and L3 interface. Configured laptop with IP 10.10.10.2/24
a. Able to ping L3
2- Removed L3 interface
3- Built Fa0/47 as router port.
a. Able to ping router port
4- Built Fa0/48
a. Connected laptop to port 0/48
5- Unable to ping 10.10.10.1 from port 0/48, able to ping myself
6- All interfaces were up/up
a. Used cross cable between port 0/46 and 0/47
06-30-2010 09:25 AM
double check config of port 48, do "sh vlan id 4000" to see if all ports appear ,
do a "sh mac-address-table vlan 4000 | inc Fa" to see if there is a mac entry in all ports.
06-30-2010 09:28 AM
I have to retest and gather the info this evening, but I did:
Switch#show spanning-tree vlan 4000
VLAN4000
Spanning tree enabled protocol ieee
Root ID Priority 36768
Address 000f.349c.9d00
This bridge is the root
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 36768 (priority 32768 sys-id-ext 4000)
Address 000f.349c.9d00
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Aging Time 300 sec
Interface Role Sts Cost Prio.Nbr Type
------------------- ---- --- --------- -------- --------------------------------
Fa0/46 Desg FWD 19 128.46 P2p
Fa0/48 Desg FWD 19 128.48 P2p
06-30-2010 09:33 AM
You should have a STP entry for the router port also, check the status and config of it
06-30-2010 09:44 AM
What do you have for an ip address for vlan 4000 ? If you have 10.10.10.0/24 on 47 as a routed port I don't believe it will let you have that same address range on a SVI for vlan 4000 .
06-30-2010 09:51 AM
I had an SVI on the switch but I removed, this is the config:
(Note: all interfaces were up/up but I didnt verify it MAC learning from every port)
interface FastEthernet0/46
switchport access vlan 4000
switchport mode access
speed 100
duplex full
spanning-tree bpdufilter enable
end
Switch#
Switch#show run int fast 0/47
Building configuration...
Current configuration : 110 bytes
!
interface FastEthernet0/47
no switchport
ip address 10.10.10.1 255.255.255.0
speed 100
duplex full
end
Switch#
Switch#show run int fast 0/48
Building configuration...
Current configuration : 144 bytes
!
interface FastEthernet0/48
switchport access vlan 4000
switchport mode access
speed 100
duplex full
spanning-tree bpdufilter enable
end
06-30-2010 09:56 AM
You would need a L3 SVI address in vlan 4000 different from the range than port 47 and then put your clients (ports)into the address range for vlan 4000 and then try pinging .
Interface vlan 4000
ip address 10.10.9.1 255.255.255.0 --- as an example, could be whatever you want
interface FastEthernet0/46
switchport access vlan 4000
switchport mode access
speed 100
duplex full
spanning-tree bpdufilter enable
end
Switch#
Switch#show run int fast 0/47
Building configuration...
Current configuration : 110 bytes
!
interface FastEthernet0/47
no switchport
ip address 10.10.10.1 255.255.255.0
speed 100
duplex full
end
Switch#
Switch#show run int fast 0/48
Building configuration...
Current configuration : 144 bytes
!
interface FastEthernet0/48
switchport access vlan 4000
switchport mode access
speed 100
duplex full
spanning-tree bpdufilter enable
06-30-2010 10:07 AM
So,
1- Keep laptop IP as 10.10.10.2/24
2- Keep laptop plugged into port Fa0/48
3- Keep cross cable between Fa0/46 and Fa0/47
4- Create SVI on VLAN 4000 with IP 10.10.9.1/24 (or whatever)
Is this correct? If so, I will retry this evening once I get home.
-Manny
06-30-2010 12:14 PM
Forgot something, revised test bed:
I can't ping 10.10.10.1 from my laptop, am I doing something wrong?
Used: Cisco 3550
Ports used: Fa0/46 ==> access port with VLAN 4000
Fa0/47 ==> router port with IP 10.10.10.1/24
Fa0/48 ==> access port with VLAN 4000
Procedure:
1- 1- Built Fa0/46 and L3 interface. Configured laptop with IP 10.10.10.2/24
a. Able to ping L3
2- 2- Removed L3 interface
3- 3- Built Fa0/47 as router port.
a. Able to ping router port
4- 4- Built Fa0/48
a. Connected laptop to port 0/48
5- 5- Used a cross-over and connected Fa0/46 to Fa0/47
6- Unable to ping 10.10.10.1 from port 0/48, able to ping myself
6- 7- All interfaces were up/up
a. Used cross cable between port 0/46 and 0/47
This test should be similar to:
laptop ==> Fa0/46 ==> Cisco 3550 ==> Fa0/48 ==> laptop
-Manny
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide