Strangly,I realized that only 1 sub if is able to ping firewall. firewall has three sub interface under aggregate 2. Aggregate 2.31, ae2.32 and ae2.33 I am able to ping from ae2.32 connected router to firewall, but can not ping from other 2 sub interfaces connected router to firewall. Same MGMT profile is used for all interfaces and A, B,C class ip addresses included in this MGMT profile. Meanwhile, both devices are visible in the ARP table.
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