New metrics: mac address table counters per vlan #29
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Docker image: nuclearcat/cisco_exporter |
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In ISPs, expecially users facing switches, it is important to monitor
number of macs per VLAN. Sometimes due misconfiguration, sometimes
malicious intent, and just due growth it is easy to miss moment when
switch will exceed internal resources.
This patch tested on NXOS: version 9.3(10), Nexus3064
Example snippet:
cisco_mactable_count{target="10.250.25.2",vlan="2015"} 86
cisco_mactable_count{target="10.250.25.2",vlan="2016"} 91
cisco_mactable_count{target="10.250.25.2",vlan="2018"} 160
cisco_mactable_count{target="10.250.25.2",vlan="2019"} 330
Signed-off-by: Denys Fedoryshchenko <[email protected]>
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I am investigating report that probably it is causing CPU usage spike in old version of NX-OS. |
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Load spike caused on switch with 40k MACs with 300+ vlans, with 2 minute polling interval. Changing interval to larger value solved problem. |
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In ISPs, expecially users facing switches, it is important to monitor number of macs per VLAN. Sometimes due misconfiguration, sometimes malicious intent, and just due growth it is easy to miss moment when switch will exceed internal resources.
This patch tested on NXOS: version 9.3(10), Nexus3064 Example snippet:
cisco_mactable_count{target="10.250.25.2",vlan="2015"} 86 cisco_mactable_count{target="10.250.25.2",vlan="2016"} 91 cisco_mactable_count{target="10.250.25.2",vlan="2018"} 160 cisco_mactable_count{target="10.250.25.2",vlan="2019"} 330