Hello guys.I have 2811 Cisco router which I configured as a DHCP server. The configuration is very basic.
[I]ip dhcp excluded-address 172.16.10.1 172.16.10.10[/I]
[I]ip dhcp excluded-address 192.168.20.1 192.168.20.10[/I]
[I]![/I]
[I]ip dhcp pool VOICE[/I]
[I]network 172.16.10.0 255.255.255.0[/I]
[I]default-router 172.16.10.1 [/I]
[I]option 150 ip 172.16.10.1 [/I]
[I]![/I]
[I]ip dhcp pool DATA[/I]
[I]network 192.168.20.0 255.255.255.0[/I]
[I]default-router 192.168.20.1 [/I]
[I]![/I]
[I]interface FastEthernet0/0[/I]
[I]ip address 10.10.10.1 255.255.255.252[/I]
[I]duplex auto[/I]
[I]speed auto[/I]
[I]![/I]
[I]interface FastEthernet0/1[/I]
[I]no ip address[/I]
[I]duplex auto[/I]
[I]speed auto[/I]
[I]![/I]
[I]interface FastEthernet0/1.10[/I]
[I]description **VOICE VLAN INTERFACE**[/I]
[I]encapsulation dot1Q 10[/I]
[I]ip address 172.16.10.1 255.255.255.0[/I]
[I]![/I]
[I]interface FastEthernet0/1.20[/I]
[I]description **DATA VLAN INTERFACE**[/I]
[I]encapsulation dot1Q 20[/I]
[I]ip address 192.168.20.1 255.255.255.0[/I]
The IP addresses are leased successfully.
[I]SYD-RTR-CME#show ip dhcp binding [/I]
[I]Bindings from all pools not associated with VRF:[/I]
[I]IP address Client-ID/ Lease expiration Type[/I]
[I]Hardware address/[/I]
[I]User name[/I]
[I]172.16.10.11 0100.1f9e.24bf.08 Dec 18 2015 03:00 PM Automatic[/I]
[I]192.168.20.11 01bc.aec5.51f6.39 Dec 18 2015 03:04 PM Automatic[/I]
Below is TCP/IP configuration of the host.
[I]C:\Users\win7>ipconfig /all[/I][COLOR=#333333][FONT=Arial][I]Windows IP Configuration[/I][/FONT][/COLOR]
[COLOR=#333333][FONT=Arial][I]Host Name . . . . . . . . . . . . : iBook[/I]
[I]Primary Dns Suffix . . . . . . . :[/I]
[I]Node Type . . . . . . . . . . . . : Hybrid[/I]
[I]IP Routing Enabled. . . . . . . . : No[/I]
[I]WINS Proxy Enabled. . . . . . . . : No[/I][/FONT][/COLOR]
[COLOR=#333333][FONT=Arial][I]Ethernet adapter Local Area Connection:[/I][/FONT][/COLOR]
[COLOR=#333333][FONT=Arial][I]Connection-specific DNS Suffix . :[/I]
[I]Description . . . . . . . . . . . : JMicron PCI Express Gigabit Ethernet Adap[/I]
[I]ter[/I]
[I]Physical Address. . . . . . . . . : BC-AE-C5-51-F6-39[/I]
[I]DHCP Enabled. . . . . . . . . . . : Yes[/I]
[I]Autoconfiguration Enabled . . . . : Yes[/I]
[I]Link-local IPv6 Address . . . . . : fe80::7d41:d47:11f2:c4fa%20(Preferred)[/I]
[I]IPv4 Address. . . . . . . . . . . : 192.168.20.11(Preferred)[/I]
[I]Subnet Mask . . . . . . . . . . . : 255.255.255.0[/I]
[I]Lease Obtained. . . . . . . . . . : Thursday, December 17, 2015 7:19:14 PM[/I]
[I]Lease Expires . . . . . . . . . . : Friday, December 18, 2015 7:23:09 PM[/I]
[I]Default Gateway . . . . . . . . . : 192.168.20.1[/I]
[/FONT][/COLOR]
[I]DHCP Server . . . . . . . . . . . : 192.168.20.1[/I]
The ping from PC to router is fine.
[I]C:\Users\win7>ping 192.168.20.1[/I][COLOR=#333333][FONT=Arial][I]Pinging 192.168.20.1 with 32 bytes of data:[/I]
[I]Reply from 192.168.20.1: bytes=32 time=1ms TTL=255[/I]
[I]Reply from 192.168.20.1: bytes=32 time<1ms TTL=255[/I]
[I]Reply from 192.168.20.1: bytes=32 time<1ms TTL=255[/I]
[I]Reply from 192.168.20.1: bytes=32 time<1ms TTL=255[/I][/FONT][/COLOR]
[COLOR=#333333][FONT=Arial][I]Ping statistics for 192.168.20.1:[/I]
[I]Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),[/I]
[I]Approximate round trip times in milli-seconds:[/I]
[/FONT][/COLOR]
[I]Minimum = 0ms, Maximum = 1ms, Average = 0ms[/I]
The router successfully pings an IP phone, however, ping to PC doesn't work.
[I]SYD-RTR-CME#ping 172.16.10.11[/I][COLOR=#333333][FONT=Arial][I]Type escape sequence to abort.[/I]
[I]Sending 5, 100-byte ICMP Echos to 172.16.10.11, timeout is 2 seconds:[/I]
[I]!!!!![/I]
[I]Success rate is 100 percent (5/5), round-trip min/avg/max = 1/2/4 ms[/I]
[I]SYD-RTR-CME#ping 192.168.20.11[/I][/FONT][/COLOR]
[COLOR=#333333][FONT=Arial][I]Type escape sequence to abort.[/I]
[I]Sending 5, 100-byte ICMP Echos to 192.168.20.11, timeout is 2 seconds:[/I]
[I].....[/I]
[/FONT][/COLOR]
[I]Success rate is 0 percent (0/5)[/I]
There is no antivirus software installed on PC. I tried to connect another router directly to SYD-RTR-CME on both f0/0 and f0/1 and ping was OK. I also tried to connect the workstation directly to another router and again ping was OK.What could be the reason of that?
