diff --git a/device/arista/x86_64-arista_7060_cx32s/Arista-7060CX-32S-Q32/th-a7060-cx32s-32x40G-t1.config.bcm b/device/arista/x86_64-arista_7060_cx32s/Arista-7060CX-32S-Q32/th-a7060-cx32s-32x40G-t1.config.bcm
index 9b0dc219307f..27fccd876c7d 100644
--- a/device/arista/x86_64-arista_7060_cx32s/Arista-7060CX-32S-Q32/th-a7060-cx32s-32x40G-t1.config.bcm
+++ b/device/arista/x86_64-arista_7060_cx32s/Arista-7060CX-32S-Q32/th-a7060-cx32s-32x40G-t1.config.bcm
@@ -449,3 +449,4 @@ serdes_preemphasis_109=0x145c00
 
 mmu_init_config="MSFT-TH-Tier1"
 phy_an_lt_msft=1
+phy_unlos_msft=1
diff --git a/src/sonic-device-data/tests/permitted_list b/src/sonic-device-data/tests/permitted_list
index 2992024b9eef..f89d80ac8bad 100644
--- a/src/sonic-device-data/tests/permitted_list
+++ b/src/sonic-device-data/tests/permitted_list
@@ -326,6 +326,7 @@ phy_pcs_repeater
 l3_alpm_hit_skip
 sai_verify_incoming_chksum
 phy_an_lt_msft
+phy_unlos_msft
 system_ref_core_clock_khz
 xflow_macsec_secure_chan_to_num_secure_assoc_encrypt
 xflow_macsec_secure_chan_to_num_secure_assoc_decrypt