VTP, Portfast, Spanning Tree and all the other switch related stuff.
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Hi everybody. I have this scenario, A 3500 cisco switch and 2900 cisco swtich. I have 3 Vlan in the 3500 and 2900 swithces, Vlan10, 20 and 30. In the 3500 also I have DHCP Server for the Vlan20 and 30, I get a valid IP address and I can ping between Vlans. I have a Router connected to the Internet and the 3500 Switch. On the 3500 I configured an Interface for route traffic to the Internet through the Router. 3500config# interface fastethernet 0/13500(config-if)# no switchport3500(config-if)# ip address 10.0.10.2 255.255.255.03500(config-if)# no shutdown3500(config-if)# exit3500(cofnig)# ip route 0.0.0.0 0.0.0.0 10.0.10.13500(config)# exit3500# show ip route 10.0.0.0/24 is subnetted, 3 subnetsC 10.0.10.0 is directly connected, Interface FastEthernet 0/1C 10.0.20.0 is directly connected, Vlan20C 10.0.30.0 is directly connected, Vlan30S* 0.0.0.0/0 [1/0] via 10.0.10.1 3500# ping 10.0.10.1 Type escape sequence to abort.Sending 5, 100-byte ICMP Echos to 10.0.10.1, timeout is 2 seconds:!!!!!Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/4 ms The Problem: From any PC that I try to ping the default gateway for the Internet 10.0.10.1 and Fail. Also I try to browse a web page do not work. PC Vlan20: IPv4 address: 10.0.20.10Subnet Mask: 255.255.255.0Default Gateway: 10.0.20.1 (3500 Vlan Interface)DNS Server: 10.0.10.3 I can ping from a PC in the VLan20 to PC in the Vlan30, I can ping from PC in the VLan 20 to all Vlan Interface on the 3500 Switch. I can ping from the 3500 Switch to PC Vlan20 and 30, I can ping from 3500 Switch to Router 10.0.10.1 and DNS server 10.0.10.3. But I can NO ping from VLAN PC to Router 10.0.10.1 and the DNS Server 10.0.10.3 and also I can no browse any web page on the Internet. Thank you for all.