Ping Issues

[ameyasingh]

I have VLAN’s 1 and 2 that are routable. Both VLAN’s are getting IP addresses via DHCP.

DHCP Scope 1 is servicing building 1 on VLAN 1 – 192.168.1.1-254.

DHCP Scope 2 is servicing building 2 on VLAN 2 – 192.168.2.1-254.

Sitting in building 1, on VLAN 1, I can ping addresses on VLAN 2 in both buildings.

Sitting in building 1, on VLAN 2, I can ping addresses only on VLAN 2 in building 1. However, I am unable to ping addresses on VLAN 2 in building 2 from building 1. The output of the ping is "Reply from x.x.x.x: Destination Host Unreachable"., where x.x.x.x is my local host. Please help. 

[Alex Pfeil]

What is the configuration on the ports connecting the two buildings?

please show interface running configuration and the trunk information connecting the buildings.

show run interface

show int "INTERFACE" trunk

[ameyasingh]

Hi Alex,

Here is the info that you requested:

Switch1#sh run interface gi0/24
Building configuration...

Current configuration : 87 bytes
!
interface GigabitEthernet0/24
switchport mode trunk
end

Switch1#sh int gi0/24 trunk

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

Port                   Vlans allowed on trunk
Gi0/24                   1-4094

Port                   Vlans allowed and active in management domain
Gi0/24                   1,2

Port                   Vlans in spanning tree forwarding state and not pruned
Gi0/24                   1,2

Switch2#sh run interface gi0/6
Building configuration...

Current configuration : 167 bytes
!
interface GigabitEthernet0/6
switchport trunk encapsulation dot1q
switchport mode trunk
storm-control broadcast level 70.00
end

Switch2#sh int gi0/6 trunk

Port      Mode    Encapsulation  Status    Native vlan
Gi0/6      on          802.1q        trunking        1

Port                   Vlans allowed on trunk
Gi0/6                          1-4094

Port                   Vlans allowed and active in management domain
Gi0/6                          1,2

Port                   Vlans in spanning tree forwarding state and not pruned
Gi0/6                          1,2

It's a P2P connection between the buildings.

[balaji.bandi]

1. what is these devices and mode which in the building 1 and 2

2. what kind of connectivity between buildings

3. is the building to building switch port configured as trunk and allow vlan 1 and 2 ?

4. also post the configuration of the interfaces connected between building 

[ameyasingh]

Hi Balaji,

1. These are Cisco Catalyst switches.

2. It's a P2P connection between the buildings.

3.

Switch1#sh run interface gi0/24
Building configuration...

Current configuration : 87 bytes
!
interface GigabitEthernet0/24
switchport mode trunk
end

Switch1#sh int gi0/24 trunk

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

Port                   Vlans allowed on trunk
Gi0/24                   1-4094

Port                   Vlans allowed and active in management domain
Gi0/24                   1,2

Port                   Vlans in spanning tree forwarding state and not pruned
Gi0/24                   1,2

Switch2#sh run interface gi0/6
Building configuration...

Current configuration : 167 bytes
!
interface GigabitEthernet0/6
switchport trunk encapsulation dot1q
switchport mode trunk
storm-control broadcast level 70.00
end

Switch2#sh int gi0/6 trunk

Port      Mode    Encapsulation  Status    Native vlan
Gi0/6      on          802.1q        trunking        1

Port                   Vlans allowed on trunk
Gi0/6                          1-4094

Port                   Vlans allowed and active in management domain
Gi0/6                          1,2

Port                   Vlans in spanning tree forwarding state and not pruned
Gi0/6                          1,2

[balaji.bandi]

ok please post L3 SVI interface configuration from both the switches.

show run interface vlan 1

show run interface vlan 2

show ip route

[ameyasingh]

When I try to ping 192.168.2.x in building 2 from 192.168.2.x in building 1, sometimes I get the result as "Reply from 192.168.2.x(my local host): Destination host unreachable" and sometimes as "Request Timed Out". Both the buildings are being serviced by different DHCP scopes using AD (In building 1, DHCP scope is defined as - 1,2 - all devices in building 1 are primarily given IP address in VLAN 1 and in building 2 it is defined as - 2,1 - all devices in building 2 are primarily given IP address in VLAN 2). Does that make a difference. 

[paul driver]

Hello

Please can you post the running config from the core switch and access switch pertaining to these two buildings?

Also include:
sh int trunk
sh vlan brief

[ameyasingh]

Hi Paul,

Here are the configs:

Hi Alex,

Here is the info that you requested:

Switch1#sh run interface gi0/24
Building configuration...

Current configuration : 87 bytes
!
interface GigabitEthernet0/24
switchport mode trunk
end

Switch1#sh int gi0/24 trunk

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

Port                   Vlans allowed on trunk
Gi0/24                   1-4094

Port                   Vlans allowed and active in management domain
Gi0/24                   1,2

Port                   Vlans in spanning tree forwarding state and not pruned
Gi0/24                   1,2

Switch2#sh run interface gi0/6
Building configuration...

Current configuration : 167 bytes
!
interface GigabitEthernet0/6
switchport trunk encapsulation dot1q
switchport mode trunk
storm-control broadcast level 70.00
end

Switch2#sh int gi0/6 trunk

Port      Mode    Encapsulation  Status    Native vlan
Gi0/6      on          802.1q        trunking        1

Port                   Vlans allowed on trunk
Gi0/6                          1-4094

Port                   Vlans allowed and active in management domain
Gi0/6                          1,2

Port                   Vlans in spanning tree forwarding state and not pruned
Gi0/6                          1,2

It's a P2P connection between the buildings.

[paul driver]

Hello

Can you post the config if thr L3 and also if applicable the access switchs 

[ameyasingh]

When I try to ping 192.168.2.x in building 2 from 192.168.2.x in building 1, sometimes I get the result as "Reply from 192.168.2.x(my local host): Destination host unreachable" and sometimes as "Request Timed Out". Both the buildings are being serviced by different DHCP scopes using AD (In building 1, DHCP scope is defined as - 1,2 - all devices in building 1 are primarily given IP address in VLAN 1 and in building 2 it is defined as - 2,1 - all devices in building 2 are primarily given IP address in VLAN 2). Does that make a difference.