On cisco SG500 switch (EOL) how to modify ARP inspection list?

[Rohit Patil]

on cisco SGH500-48 if i have a preconfigured IP arp inspection list

ip arp inspection list create servers
ip k.k.k.k mac-address aa.aa.aa.aa.aa
ip l.l.l.l mac-address bb.bb.bb.bb

To add new entries to the ARP inspection list,

ip arp inspection list create servers
ip m.m.m.m mac-address cc.cc.cc.cc

will this wipe out the existing entries? or should i use the command like below:

ip arp inspection list create servers
ip k.k.k.k mac-address aa.aa.aa.aa.aa
ip l.l.l.l mac-address bb.bb.bb.bb
ip m.m.m.m mac-address cc.cc.cc.cc

[amikat · Accepted solution]

Hi,

After issuing the "ip arp inspection list create servers" you enter the ARP list configuration mode where you can either create (ie. add) or delete (ie. remove - if existing) the static ARP binding (using "ip mac"/"no ip mac" command). No existing binding is wiped out automatically when you enter the ARP list configuration mode (config-arp-list). 

You can check the result via the "show ip arp inspection list" command.

So regarding your example the procedure would be as follows:

ip arp inspection list create servers
ip m.m.m.m mac-address cc.cc.cc.cc

Best regards,

Antonin

[balaji.bandi · Accepted solution]

Most cases it will add new entry - not it going to wipe old one.

In case you think that will wipe old one, then add old config in text file and add new to to the exiting mac table paste all of them so all will be safe.