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linux network

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Last Modified: 2013-12-23
i have one linux network card, eth0

eth0 >>>>>>> switch >>>>>>>>>>> PC1, PC2

eth0, ip address 192.168.10.10 mask 255.255.255.0

i added a second ip, using ip addr add 192.168.20.10 255.255.255.0

PC1, ip address 192.168.10.11
PC2, ip address 192.168.20.11

PC1 i can ping to both 192.168.10.10 and 192.168.20.10

PC 2 i cant ping to any

what might be the problem
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