Router Hardware Management Guide for Cisco 8000 Series Routers, Cisco IOS XR Release

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Router Hardware Management Guide for Cisco 8000 Series Routers, Cisco IOS XR Release

Online Insertion and Removal for optical modules

Updated: July 1, 2026

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Provides Online Insertion and Removal (OIR) guidelines for optical modules on the routers, MPA, and .

These guidelines apply for the Online Insertion and Removal (OIR) of the optical modules on these routers, MPA, and :

  • Cisco 8711-48Z-M router

  • Cisco 8712-MOD-M router with 8K-MPA-18Z1D MPA

  • Cisco 8404-SYS-D with 84-MPA-2H12Z-M MPA

Guidelines for re-inserting optics

  • After removing certain Cisco 1G Bidirectional optics, 1G Coarse Wavelength Division Multiplexing (CWDM) optics, or 10G Bidirectional SFP optics, wait for at least 15 minutes before re-inserting the same optics into any SFP port.

  • The 15 minute wait time also applies to all third-party 1G and 10G optics, as their behavior is not verified by Cisco.

  • This wait time does not apply when installing new or unused optics.

The wait time applies to these optics:

Optics Type

PID

Cisco 1G Bidirectional Optics

  • GLC-BX40-DA-I

  • GLC-BX40-D-I

  • GLC-BX40-U-I

  • GLC-BX80-D-I

  • GLC-BX80-U-I

For more details, refer to the Data sheet.

Cisco 1G CWDM Optics

CWDM-SFP-xxxx

For more details, refer to the Data sheet.

Cisco 10G Bidirectional Optics

  • SFP-10G-BXD-I

  • SFP-10G-BXU-I

  • SFP-10G-BX40U-I

  • SFP-10G-BX40D-I

For more details, refer to the Data sheet.

Third-party 1G and 10G optics

NA

Wait time guidelines applicable to Cisco 8711-48Z-M router

  • The 48 SFP56 ports are divided into four groups:

    • Group 1: Ports 0–11

    • Group 2: Ports 12–23

    • Group 3: Ports 34–45

    • Group 4: Ports 46–57

  • Group 5: Ports 24-33, includes four QSFP56 and six QSFP-DD ports.

  • If the same optics are re-inserted on the router within 15 minutes, a brief disruption or link flap may occur on the remaining 11 SFP56 ports of the same group. Other groups remain unaffected.

  • Inserting optics into Group-5 ports does not cause any disruptions.

Wait time guidelines applicable to Cisco 8712-MOD-M router with 8K-MPA-18Z1D MPA

  • The 19 ports (18 SFP56 + 1 QSFP56-DD) are divided into two groups:

    • Group 1: Ports 0–8

    • Group 2: Ports 9–18

  • If the same optics are re-inserted on the router within 15 minutes, a brief disruption or link flap may occur on the remaining ports of the same group. Other groups remain unaffected and ports on other MPAs remain unaffected.

  • Inserting optics into QSFP28, QSFP56, or QSFP-DD ports does not cause any link disruptions.

Wait time for re-inserting 1G and 10G optics in Cisco 8404-SYS-D with 84-MPA-2H12Z-M MPA

When using the Cisco 8404-SYS-D chassis equipped with the 84-MPA-2H12Z-M MPA, special considerations are required when removing and re-inserting certain 1G and 10G optics. Proper wait times help prevent network disruptions and maintain stable operation, especially when dealing with specific SFP types and third-party optics.

Key Recommendation

After removing any of the following optics from the 84-MPA-2H12Z-M MPA module, you must wait at least 15 minutes before re-inserting the same optic into any SFP port:

Note

No 15-minute wait is required when installing new (unused) optics.

Impact when you insert SFP optic within 15 minutes

If you re-insert the same SFP optic within 15 minutes on the 8404-SYS-D with the 84-MPA-2H12Z-M MPA:

  • Same groups: There may be a brief link disruption (link flap) on the other ports within the same group as the port where the optic is inserted.

  • Other groups and MPAs: Ports in other groups on the same MPA, or on other MPAs in the same chassis, will not experience any link disruption.

Port Grouping

  • The 84-MPA-2H12Z-M MPA has a total of 14 ports (12 SFP + 2 QSFP), divided into two groups:

    • Group 1: Ports 0–7

    • Group 2: Ports 8–13

  • QSFP28 Ports: Inserting optics into QSFP28 ports does not cause link disruptions on any ports