For checking transmission links on Cisco Routers, it is good to know how to find out the optical power of 100GE modules or interfaces for troubleshooting and making sure the desired or optimal range is meet. Here are the sample commands for checking the TX/RX optical power. show controllers <100G interface name> phy Sample Output: RP/0/RSP0/CPU0:CISCO-ROUTER#show controllers HundredGigE0/1/0/0 phy PHY data for interface: HundredGigE0/1/0/0 Rx 64B66B Lane Sync PCS Virt PCS Service Block Marker Header Lane Lane Lane Lane Lock…
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