I changed router int g0/0 to be in same subnet of switch 192.168.10.2 /24. I can now ping g0/0 from switch but have to assign default-gateway of 192.168.10.2 on each switch for each switch to be able to ping router. I can ping router g0/1 172.16.1.1 from switch but cannot ping beyond this port (I have a computer connected with nic 172.16.1.2).

Take a Window PC as an example. If you configured a NIC with an IP address and subnet mask but no gateway and then tried to ping a device on a different L3 network you would never see an ARP from the PC. However, if you added a default gateway to the configuration and then tried to ping again you would see an ARP. Take a look at this screen shot:

Here i am unable to ping or telnet to the SW1 (10.10.172.229). The switch is UP and traffic is passing through. Switch is showing in router's neighbor table. (show cdp neighbor). And more over i am able to telnet to the downstream switches (SW2 & SW3). Please help me to solve the issue. Thanks & Regards, Manu

Hi Frank. I can think of a scenario where your interface is set to autonegotiation disabled, or "force-up," so it shows the port in an up-state, but the link really isn't up, as can be seen by the pings not working (speed nonegotiate under interface).

The difference between the ping to the default GW in vlan20 and the ping to the PC in vlan20 is, that the GW is on the device directly connected to vlan10 (on the switch), so no ip routing on the switch is necessary.

After I done all these changes. SW1 and SW3 is able to ping different vlans and able to ping PC1 and SRV1. But PC1 and SRV is only able to ping IPs on themself vlans, they can't ping differnt vlan IP. For example, PC1 is not able to ping SRV1. But it is able to ping vlan 10 on10.10.10.6 and 10.10.10.7. It is not able to ping 10.10.20.6 either

The ping won't work until an ip address is configured on the switch as well. Both the PC and the switch need to be on the same subnet. Configuration on switch - Switch(config) #int vlan 1 . Switch(config-if) #ip add x.x.x.x x.x.x.x . Switch(config-if) #no shut . Once this is done, you will be able to ping the switch from the PC.

2021年3月17日 · However when I tried to put more host in, the computer in different subnets are unable to ping each other. In my network, the computers on subnet CICS (208.67.30.64/26) is able to ping the serial interface s0/1/0 of router IntRobo. However, the computer on the IntRobo is unable to ping the serial interface s0/1/0 of router CICS.

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I think it all depends on how the protocol is implemented on the OS involved. For example, on a Windows system you can try to ping 255.255.255.255 but it will tell you to go pound sand. However, on IOS you can ping 255.255.255.255. On a Windows system, you can ping the broadcast address like this: 192.168.1.255 and you MAY get multiple ...