Once I was asked to configure Cisco ISR C1121X-8P, this router model had only a MicroUSB console port, a regular cable was suitable for connection, a COM8 port appeared in the device manager, to which I was able to connect via putty at a speed of 9600.
Continue reading “How to Configure Cisco C1121X-8P”Category Archives: Cisco
Setting up logs on Cisco Nexus
In this article I will give an example of setting up logs on Cisco Nexus switches.
Continue reading “Setting up logs on Cisco Nexus”SNMP OID for Cisco Nexus
For example, I will take Cisco Nexus 3064 (N3K-C3064PQ-10GX) and make a template for it in Zabbix, I will briefly describe the main SNMP OID/MIB that I used:
Continue reading “SNMP OID for Cisco Nexus”linkFlapErrDisabled on Cisco Nexus
I once noticed that the port is periodically disconnected on the Cisco Nexus N3K-C3064PQ-10GX switch, there are a lot of records in the logs that the link was falling and rising, I looked at the status of the port:
Continue reading “linkFlapErrDisabled on Cisco Nexus”Solution channel-group command failed: port not compatible Duplex Mode
Once on Cisco Nexus I met errors of this type:
Continue reading “Solution channel-group command failed: port not compatible Duplex Mode”Cisco Nexus SNMP OID for Transceiver
Once I needed to monitor the optical signal level on the Cisco Nexus C3064PQ-10GX to prevent cable sagging, stretching and signal loss, because in this case the signal deteriorates gradually, usually I monitor the signal on the end equipment, but I came across an old BDCOM 3310B model in which there was no support DDM.
Continue reading “Cisco Nexus SNMP OID for Transceiver”High CPU load on Cisco Nexus 3064
Once I discovered on the graphs a large burst of Multicast packets on one of the ports of the Cisco Nexus 3064 switch, while the CPU load increased to 30%, before that it was 12% with L2 traffic of 13 Gbit/s.
Continue reading “High CPU load on Cisco Nexus 3064”Cisco Nexus 3000 Series NX-OS Fundamentals Command Reference
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Last modified: July 2016
LACP Link Aggregation on Cisco Nexus 3064
I will give an example of configuring LAG (LACP) on a Cisco Nexus 3064.
Continue reading “LACP Link Aggregation on Cisco Nexus 3064”Configuring DHCP Relay on Cisco Nexus 3064
For example, I will configure DHCPv4 Relay on Cisco N3K-C3064PQ-10GX. Initially, I configured this switch for L2, but some VLANs had to be configured as L3 and DHCPv4 Relay enabled.
Continue reading “Configuring DHCP Relay on Cisco Nexus 3064”