2010/10/6 ராஜ பாண்டி <[email protected]>: > > I am having a switch ,one server and 3 systems which are connected to > the switch. The IPs are 192.168.48.9, 108,109,110 respectively. > Netmask is 255.255.240.0 .
I am presuming the "server" is 192.168.48.9 since you have not explicitly stated so. What is your objective for using a /28 netmask? Anyway, with a /28 netmask, the "server" is on a different subnet vis-a-vis your other systems. see [1] and [2] > Now there is no problem in ping command > among 108,109,110 always. But i can ping the server from only one > system either 108 or 109 or 110. Given you are using a /28 netmask this is interesting ... even though the 2 subnets are on the same physical fabric, you would need some kind of routing to occur for ping to work between hosts on the 2 subnets. > If 192.168.48.109 pings the server, > 108,110 did not ping the server. After some interval 192.168.48.110 > pings and 192.168.48.109,108 did not ping the server. I also checked > the cables. They are all right. What is the problem in network > connection? Can someone bring me out? IMO, the netmask is your problem. With a /24 netmask all the machines should be able to ping each other. (make sure iptables and SE Linux are disabled) Buy a new switch if the problem still persists. [1] $ sipcalc 192.168.48.9 255.255.255.240 -[ipv4 : 192.168.48.9 255.255.255.240] - 0 [CIDR] Host address - 192.168.48.9 Host address (decimal) - 3232247817 Host address (hex) - C0A83009 Network address - 192.168.48.0 Network mask - 255.255.255.240 Network mask (bits) - 28 Network mask (hex) - FFFFFFF0 Broadcast address - 192.168.48.15 Cisco wildcard - 0.0.0.15 Addresses in network - 16 Network range - 192.168.48.0 - 192.168.48.15 Usable range - 192.168.48.1 - 192.168.48.14 [2] $ sipcalc 192.168.48.108 255.255.255.240 -[ipv4 : 192.168.48.108 255.255.255.240] - 0 [CIDR] Host address - 192.168.48.108 Host address (decimal) - 3232247916 Host address (hex) - C0A8306C Network address - 192.168.48.96 Network mask - 255.255.255.240 Network mask (bits) - 28 Network mask (hex) - FFFFFFF0 Broadcast address - 192.168.48.111 Cisco wildcard - 0.0.0.15 Addresses in network - 16 Network range - 192.168.48.96 - 192.168.48.111 Usable range - 192.168.48.97 - 192.168.48.110 -- Arun Khan _______________________________________________ ILUGC Mailing List: http://www.ae.iitm.ac.in/mailman/listinfo/ilugc
