jskfan
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How computer Arp Table gets populated.
How computer Arp Table gets populated.
I would like to know How computer Arp Table gets populated..
for instance on my computer I see Dynamic and Static entries, the Static entries are all Multicats range , the 224 and 239.
for The Dynamic entries, I see some IP addresses on the same subnet as my computer, but other IP addresses are on the same subnet as my Default Gateway subnet.
So how do they get populated?
if I ping a computer on the other VLAN, then run arp -a , I cannot see its IP address in the ARp table.
Any clarification on this ?
Thank you
I would like to know How computer Arp Table gets populated..
for instance on my computer I see Dynamic and Static entries, the Static entries are all Multicats range , the 224 and 239.
for The Dynamic entries, I see some IP addresses on the same subnet as my computer, but other IP addresses are on the same subnet as my Default Gateway subnet.
So how do they get populated?
if I ping a computer on the other VLAN, then run arp -a , I cannot see its IP address in the ARp table.
Any clarification on this ?
Thank you
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or you need to check the routing table and will find the mac address of the gateway in the arp table.
ASKER
sorry
> My computer is 10.10.10.46/24 its DG: 10.10.12.1/24 : Not Correct
My computer is 10.10.10.46/23 its DG: 10.10.12.1
> My computer is 10.10.10.46/24 its DG: 10.10.12.1/24 : Not Correct
My computer is 10.10.10.46/23 its DG: 10.10.12.1
ASKER
And I pinged a host 10.10.12.66 (Which in the same subnet as my DG), then after I ran arp -a , I saw the 10.10.12.66 with a corresponding MAC accress
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ASKER
Sorry , Sorry ...
PC= 10.10.211.46/23
DG= 10.10.210.1
So DG subnet should be covered by the subnet where the PC is.
/23 will include : 10.10.192.0 to 10.10.255.255
The DG ip : 10.10.210.1 is already inside the range /23 10.10.192.0 to 10.10.255.255
PC= 10.10.211.46/23
DG= 10.10.210.1
So DG subnet should be covered by the subnet where the PC is.
/23 will include : 10.10.192.0 to 10.10.255.255
The DG ip : 10.10.210.1 is already inside the range /23 10.10.192.0 to 10.10.255.255
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ASKER
how did you come with this ?
10.10.210.0/23 would have a range of:
10.10.210.1 - 10.10.211.254
10.10.210.0/23 would have a range of:
10.10.210.1 - 10.10.211.254
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Oh... and one piece I didn't spell out. The /23 is the number of 1 bits in the subnet mask being:
mask 1111 1111.1111 1111.1111 1110.0000 0000 = 23 bits on in the mask.
mask 1111 1111.1111 1111.1111 1110.0000 0000 = 23 bits on in the mask.
ASKER
Thank you Guys
ASKER
For instance.
My computer is 10.10.10.46/24 its DG: 10.10.12.1/24
if I ping any computer in 10.10.10.0 I can find it in arp table using arp -a command
If I if I ping any computer in 10.10.12.0 I can find it in arp table using arp -a command
but if I ping any computer in 10.10.13.0 I cannot find it in arp table using arp -a command