ICMP problem

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Highlighted
L0 Member

ICMP problem

I have very simple topology 

 

Huawei switch Eth-trunk----------------Aggregation Palo alto ------------P2P------- Router

 

In Huawei switch 

created two vlan's  vlan 10 , vlan 20

interface vlan 10

ip address 172.16.1.100

interface vlan 20

ip address 172.16.2.100

ip static-route 0.0.0.0 0.0.0.0 172.16.1.100

 

In palo alto 

 

Aggregation with two sub-interfaces

Aggregation.10

vlan tag 10

ip address 172.16.1.1 255.255.255.0

 

Aggregation.20

vlan tag 20

ip addreass 172.16.2.1 255.255.255.0

 

Interface toward Router 

ip address 172.19.1.1 255.255.255.0

 

default route 0.0.0.0 0.0.0.0 172.19.1.4

 

In the router 

interface toward firewall 

ip address 172.19.1.2 255.255.255.0

 

default route 0.0.0.0 0.0.0.0 172.19.1.1

 

The problem 

 

From Huawei switch 

I can ping 172.19.1.4 when the source will be 172.16.1.100 but when the source will be 172.16.2.100 , I can not ping

 

When I changed the default route in the huawei switch to be 0.0.0.0 0.0.0.0 172.16.2.100 

at this time I can ping 172.19.1.4 when the source will be 172.16.2.100 but I can not ping 172.19.1.4 when the source will be 172.16.1.00 

 

something wrong in the Palo alto when handling the return echo-reply if the return path is different

 

Please advise 

 

 

 

Highlighted
L0 Member

Re: ICMP problem

Sorry ,

 

In the router 

interface toward firewall 

ip address 172.19.1.4 255.255.255.0 

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