> Source: [sk182809](https://support.checkpoint.com/results/sk/sk182809)

# sk182809 - "__ib_cache_gid_add: unable to add gid XXXXXX error=-28" appears repeatedly in dmesg

| Property | Value |
|----------|-------|
| Solution ID | sk182809 |
| Date Created | 2024-11-04 |
| Last Modified | 2024-11-04 |
| Technical Level | Advanced |
| Products | Hardware |
| Versions | Not Version-Specific |
| OS | Gaia |

## Symptoms

- Output of the "`dmseg` command shows this line repeatedly:

`__ib_cache_gid_add: unable to add gid <GID> error=-28`

Example:

`__ib_cache_gid_add: unable to add gid 0000:0000:0000:0000:0000:ffff:11f9:c203 error=-28`

## Cause

The driver of the 100G Acceleration Card shows this message when the link state changes while RoCE (RDMA over Converged Ethernet) packets pass through the Acceleration Card ports.

## Solution

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