Hi Guys,
Got a wierd problem here, I will start by showing the IP INT BRIEF:
SPH_Bluebell_3750#show ip interface brief
Interface IP-Address OK? Method Status Protocol
Vlan1 10.100.2.55 YES NVRAM up up
Vlan69 10.214.69.123 YES manual administratively down down
GigabitEthernet1/0/1 unassigned YES unset down down
GigabitEthernet1/0/2 unassigned YES unset up up
.... etc
and now the default gateway:
SPH_Bluebell_3750#show ip default
10.214.69.126
and now the CDP neighbour:
A1_65K 1/0/25 138 R S I WS-C6506- Gig 1/10
Now the interface betweeb this switch and the CDP is trunked:
SPH_Bluebell_3750#show run interface gigabitEthernet 1/0/25
interface GigabitEthernet1/0/25
switchport trunk encapsulation dot1q
switchport mode trunk
end
NOW THIS IS THE CONFUSING PART:
the default VLAN is 1. THe IP addresses 10.1.1.3, 10.214.69.126 and 10.100.1.249 ALL belong to the same device and this device is the A1_65k which is directly connected according to the show CDP neighbour. however when I trace route to them the give different results as shown below:
all traceroute apart from 10.100.1.249 gives the traceroute below:
SPH_Bluebell_3750#traceSPH_Bluebell_3750#traceroute 10.1.1.3
Type escape sequence to abort.
Tracing the route to 10.1.1.3
1 10.100.2.4 0 msec 0 msec 8 msec
2 10.100.4.25 0 msec 0 msec 9 msec
3 10.100.4.9 0 msec * 0 msec
however traceroute below is working correctly as it is directly trunked:
SPH_Bluebell_3750#traceroute 10.100.1.249
Type escape sequence to abort.
Tracing the route to 10.100.1.249
1 10.100.1.249 0 msec * 0 msectra
QUESTION:
I can see that traceroute works correctly for for interfaces on this switch belong to same subnet. However why is the device routing through 10.100.2.4? there is no routing table on this switch as shown below!
SPH_Bluebell_3750#show ip route
Default gateway is 10.214.69.126
Host Gateway Last Use Total Uses Interface
ICMP redirect cache is empty
SPH_Bluebell_3750#
I appreciate your assistance in figuring this out! Thanks in advance.
