problem in two switch communicate

[hamedha]

I try to create communicate between 2 different switch model 4500 and 3750
I can ping vlan in switch 3750 from host in swith 4500
but I cannot ping host in swith 4500 to host inn switch 3750

attached configuration 

[Francesco Molino]

Hi

When you're trying to ping from hosts attached to 3750 to hosts attached to 4500, are these hosts in vlan 10?
If not, can you test just from host to host in vlan 10?

What is the default gateway of hosts in both switches?

[hamedha]

thank you for your fast repaly
host in switch 4500 in vlan30 default gateway 192.168.30.100
host in switch 3750 in vlan10 default gateway 10.40.10.150


from host in vlan30 i can ping 10.40.10.150 but i cannot ping host in vlan10

[MUHAMMAD TAYYAB MUNIR]

Hi,

on 3750 switches no need to configure SVI, if you configured SVI for remote accessthan  update host gateway connected hosts on 3750  to  10.40.10.100 and don't forget to configure the "ip default-gateway 10.40.10.100 "

BR
Tayyab

[Francesco Molino]

From vlan 30, sure you can ping 3750 vlan 10 interface because your 4500 has an IP into vlan 10 and knows how to reach 10.40.10.150.

The invert isn't true because when hosts try to reach vlan 30 hosts, they arrive on your 3750 svi and this switch has no clue how to reach vlan 30. What you can do very easily is to add a static route on your 3750 to allow hosts to talk to each others.

The static route on 3750 switch should looks like:

ip route 192.168.30.0 255.255.255.0 10.40.10.100

Can you test and let us know please?

[hamedha]

I added as you told me
ip route 192.168.30.0 255.255.255.0 10.40.10.100
but I cannot ping

[Francesco Molino]

From the 3750 switch itself, can you ping 4500 IP 192.168.30.100 ?
Can you make sure ip routing is enabled on your 3750?
Can you share a diagram please?

[hamedha]

From the 3750 switch itself, can you ping 4500 IP 192.168.30.100 ? yes I can ping 

Can you make sure ip routing is enabled on your 3750? yes its enable

PC1------------Switch 3750---------(interface trunk 1/0/8 )Switch 4500---PC1

 Switch 4500:

vlan10 

ip address 10.40.10.150

vlan20

ip address 192.168.30.100

 vlan 30

ip address 192.168.1.100

Switch 3750:

vlan10

ip address 10.40.10.100

now at least I want users in Switch 3750 (vlan10) ping users in  Switch 4500 (any vlan).

[paul driver]

Hello

3750

ip routing DISABLED 

trunk to 4500 (allow all vlans)

l2 vlans are populated in bro database

4500

io routing ENABLED 

trunk to 3750 (allow all vlans)

L2 vlans are populated in fro databae

host pc

disable any software Fw on pc just make sure icmo isn’t be restricted 

has deafult gateway of L3 svi to which vlan it is assigned to

[amikat]

Hi,

will you please change the DG of your hosts in Vlan10 to 10.40.10.100, ie. int Vlan10 address at switch4500 instead of 10.40.10.150. If your trunk between both swithes is set up correctly this should get the required result.

Best regards,

Antonin

[Vishnu Vardhan S]

Please share the diagram and where is the host. 

I could see an interface under VRF

interface FastEthernet1
ip vrf forwarding mgmtVrf
ip address 192.168.1.1 255.255.255.0
speed auto
duplex auto

Normally we cannot reach an IP inside interface from outside untill the interface under VRF is directly connected to other switch. 

PC2-----------InterfaceVRF-Switch A---------Switch B---PC1

                                                    |

                                                    |

                                                    |

                                                    |

                                               PC3

In this case PC1 cannot ping PC2, however, PC1 can ping PC3. 

[Leo Laohoo]

Is the link between the two even up?