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Traffic flowing through Fw

mahesh18
Frequent Contributor
Frequent Contributor

                   Hi Everyone,

We have SVI vlan on layer 3 core switch A.

this switch has connection to ASA  and also to another B Layer 3 switch.

B Layer 3 switch connects to Layer 2 switch which has this vlan.

Need to undertsand traffic flow from user PC to Switch A.

Switch B has default route which is static to fw for subnet of vlan.

Now traffic goes from layer 2 switch to core Switch B  then it has static route for that vlan which is ASA as next hop.

now traffic comes to ASA  from there it goes to core Switch B which has SVI Vlan in it.

Also Core Switch A and B has trunk connection which carries that vlan.

Need to know if return traffic from core Switch A comes via ASA or by Switch B?

How can i check this?

Thanks

MAhesh

1 Accepted Solution

Accepted Solutions

Julio Carvajal
Advisor
Advisor

Hello Mahesh,

Not sure if I undertsood the topology but anyway the way to test this would be creating captures on the interface where you think the ASA should receive the traffic, if you do not see the packets there well that would lead us to the returning traffic going to Switch B.

Julio Carvajal
Senior Network Security and Core Specialist
CCIE #42930, 2xCCNP, JNCIP-SEC

View solution in original post

2 Replies 2

Julio Carvajal
Advisor
Advisor

Hello Mahesh,

Not sure if I undertsood the topology but anyway the way to test this would be creating captures on the interface where you think the ASA should receive the traffic, if you do not see the packets there well that would lead us to the returning traffic going to Switch B.

Julio Carvajal
Senior Network Security and Core Specialist
CCIE #42930, 2xCCNP, JNCIP-SEC

Many thanks Julio

Regards

MAhesh

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