For traceroute, you can use traceroute -s to specify the source IP address. Thus, you can choose either an egress interface/VRF or a source IP address. With ping -I, you can specify the source interface or the source IP address, but you cannot use the flag more than once. Doing so causes the routing lookup for the destination address to occur in that VRF. However, you can use the source interface flag instead to specify a non-default VRF to use for the command. In the default VRF, the source interface flag ( ping -I or traceroute -i) specifies the egress interface for the ping/ traceroute operation. Ping and traceroute have additional arguments that you can use to specify an egress interface and/or a source address. If the shell’s VRF context is mgmt, then these commands are run in the default VRF context. This is done using a mechanism that checks the VRF context of the current shell - which can be seen when you run ip vrf id - at the time one of these commands is run. For example: sudo ip vrf exec Tenant1 nslookup - 8.8.8.8īy default, ping/ ping6 and traceroute/ traceroute6 all use the default VRF. This is particularly useful for network utilities like ping, traceroute, and nslookup. You can use ip vrf exec to run commands in a non-default VRF context. Traceroute tracks the route that packets take from an IP network on their way to a given host. When troubleshooting intermittent connectivity issues, it is helpful to send continuous pings to a host. To test the connection to an IPv6 host: ping6 -I swp1 2001::db8:ff:fe00:2 To test the connection to an IPv4 host: ping 192.0.2.45 ping also calculates the time it takes for packets to travel the round trip. Use ping to check reachability of a host. Network TroubleshootingĬumulus Linux includes a number of command line and analytical tools to help you troubleshoot issues with your network. If you are redirected to the main page of the user guide, then this page may have been renamed please search for it there. The current version of the documentation is available If you are using the current version of Cumulus Linux, the content on this page may not be up to date. Resource Diagnostics Using cl-resource-query.Using Nutanix Prism as a Monitoring Tool.Simple Network Management Protocol - SNMP.Monitoring System Statistics and Network Traffic with sFlow.

Using NCLU to Troubleshoot Your Network Configuration.Monitoring Interfaces and Transceivers Using ethtool.Understanding the cl-support Output File.Network Switch Port LED and Status LED Guidelines.Unequal Cost Multipath with BGP Link Bandwidth.Equal Cost Multipath Load Sharing - Hardware ECMP.Bidirectional Forwarding Detection - BFD.Hybrid Cloud Connectivity with QinQ and VXLANs.Ethernet Virtual Private Network - EVPN.Virtual Router Redundancy - VRR and VRRP.Default Cumulus Linux ACL Configuration.

Authentication, Authorization and Accounting.

Wireshark uses icmp traceroute