# Troubleshooting Router Graphs

In some cases, the router graphs (and their corresponding monitors) may experience stagnant data collection. Below are the cause and troubleshooting methods to rectify the same.

## Widgets not displaying data under the 'Router Graphs' tab

**Cause:** Every graph will need a particular set of performance monitors to be associated with the device. The data collected by these monitors are collectively displayed in the corresponding graphs. If the respective monitors are not associated or if there is no data collection in that particular monitor, the graphs will not display any data.

**Solution:**

1. In OpManager, router graphs are specific only to Cisco devices. Below is a list of graphs and the corresponding monitors they require in order to display the necessary data. Check if these performance monitors are properly associated.

| Graph name | Mandatory Performance monitors |
|---|---|
| Buffer Hits | Medium Buffer Hits |
| Buffer Hits | Big Buffer Hits |
| Buffer Hits | Total Large Buffer Hits |
| Buffer Hits | Total Huge Buffer Hits |
| Buffer Misses | Small Buffer Misses |
| Buffer Misses | Medium Buffer Misses |
| Buffer Misses | Big Buffer Misses |
| Buffer Misses | Total Large Buffer Misses |
| Buffer Misses | Total Huge Buffer Misses |
| Buffer Failures | Buffer Create Failures |
| Cisco Memory Utilization | Cisco Memory Utilization |
| Router CPU utilization | CPU Usage (5 mins avg) |

2. Check if data collection is properly conducted at all the associated monitors. If not, query the device and check if it responds to the OIDs listed below.

| Graph | OID |
|---|---|
| Buffer Hits | .<ip_address_1>.4.1.9.2.1.18.0 |
| Medium Buffer Hits | .<ip_address_1>.4.1.9.2.1.26.0 |
| Big Buffer Hits | .<ip_address_1>.4.1.9.2.1.34.0 |
| Large Buffer Hits | .<ip_address_1>.4.1.9.2.1.42.0 |
| Huge Buffer Hits | .<ip_address_1>.4.1.9.2.1.66.0 |
| Small Buffer Misses | .<ip_address_1>.4.1.9.2.1.19.0 |
| Medium Buffer Misses | .<ip_address_1>.4.1.9.2.1.27.0 |
| Big Buffer Misses | .<ip_address_1>.4.1.9.2.1.35.0 |
| Large Buffer Misses | .<ip_address_1>.4.1.9.2.1.43.0 |
| Huge Buffer Misses | .<ip_address_1>.4.1.9.2.1.67.0 |
| Buffer Failures | .<ip_address_1>.4.1.9.2.1.46.0 |
| Cpu Usage % (RouterCPUUtilization) | .<ip_address_1>.4.1.9.2.1.58.0 |
| Memory Utilization % (CiscoMemoryUtilization) | (.<ip_address_1>.4.1.9.9.48.1.1.1.5.1*100)/(.<ip_address_1>.4.1.9.9.48.1.1.1.5.1+.<ip_address_1>.4.1.9.9.48.1.1.1.6.1) |