Hello,

DELL 5248F-ON

Dell EMC Networking OS10 Enterprise
Copyright (c) 1999-2021 by Dell Inc. All Rights Reserved.
OS Version: 10.5.3.0
Build Version: 10.5.3.0.44
Build Time: 2021-10-06T23:03:55+0000
System Type: S5248F-ON
Architecture: x86_64
Up Time: 1 day 00:25:22

I do have VLAN 201 as configuration on below.

interface vlan201
no shutdown
ip address 10.10.253.1/24

I have a server that config IP address 10.10.253.4, 10.10.253.5 but arp is not update until I ping them.

Here is details.

I Try to clear all ARPs for this vlan and then I check arp table, it's blank

5248F-ON# clear ip arp interface vlan 201
5248F-ON# show ip arp | grep vlan201
5248F-ON#
5248F-ON#

Then I try to ping 10.10.253.4, 10.10.253.5 and then arp are show up in the ARP tables (you will see that a first packet reached to 10.10.253.4, 10.10.253.5 will get the high latency)

C:\Users\iLhay>ping 10.10.253.3

Pinging 10.10.253.3 with 32 bytes of data:
Reply from 10.10.253.3: bytes=32 time=2025ms TTL=62
Reply from 10.10.253.3: bytes=32 time=6ms TTL=62
Reply from 10.10.253.3: bytes=32 time=6ms TTL=62
Reply from 10.10.253.3: bytes=32 time=6ms TTL=62

Ping statistics for 10.10.253.3:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 6ms, Maximum = 2025ms, Average = 510ms

C:\Users\iLhay>ping 10.10.253.4

Pinging 10.10.253.4 with 32 bytes of data:
Reply from 10.10.253.4: bytes=32 time=2020ms TTL=62
Reply from 10.10.253.4: bytes=32 time=5ms TTL=62
Reply from 10.10.253.4: bytes=32 time=6ms TTL=62
Reply from 10.10.253.4: bytes=32 time=6ms TTL=62

Ping statistics for 10.10.253.4:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 5ms, Maximum = 2020ms, Average = 509ms

then I checked ARP tables again, it show up.

5248F-ON# show ip arp | grep vlan201
10.10.253.3 2c:60:0c:6e:de:dc vlan201 port-channel3
10.10.253.4 2c:60:0c:6e:c3:78 vlan201 port-channel3

so, now the problem is I need to ping all IPs in the entire network for making them show up. How can I make this automatically learn?

Thank you.