Description

This article provides guidance on the arp behavior in the scenario where a host is connected to an individual port in mclag (single home)

Symptoms

Setup:

 

host 10.6.4.6 >>> ge-0/0/2 <<< PEER1 >>> ae0 icl-iccp <<< PEER2

 

Setting the command: 

l2 learning mclag-arpreq-sync but arp learned on one peer but not the other.

 

{master:0}[edit]

root@PEER1# run show arp no-resolve expiration-time | match 10.6.4 |

00:50:56:9e:26:87 10.6.4.6       irb.6 [ge-0/0/2.0]   906   none




{master:0}[edit]

root@USMKEC0B06F01SE00# run show arp no-resolve expiration-time | match 10.6.4

---(refreshed at 2024-08-20 08:03:47 PDT)---

---(refreshed at 2024-08-20 08:03:50 PDT)---

Solution

Since VLAN 6 is not a member of any MC-LAG MC-AE, ICCP/ICL does not duplicate MAC addresses to another peer. Hence, this behavior is expected.

 

Modification History

2024-09-06 : Article Created