The VLAN identity is an optional entry only for non-sub-interfaces. The optional vlan-id keyword allows packet tracer to enter a parent interface, which is later redirected to a subinterface that matches the VLAN Of the utility comes from the ability to simulate real-world traffic by specifying source and destination addresses with protocol Along the way, the packet is evaluated against flow and route lookups, ACLs, protocol inspection, and NAT. packet-tracer allows a firewall administrator to inject a virtual packet into the security appliance and track the flow from ingress toĮgress. The packet-tracer command provides detailed information about the packets and how they are processed by the ASA. Search for an IPv4 or IPv6 address based on the user identity and the FQDN. Show a timeline of packet changes in a datapath. Show all rules applicable to a packet along with the CLI lines that caused the rule addition. Verify the configuration is working as intended. The packet-tracer command enables you to do the following:ĭebug all packet drops in a production network. In addition to capturing packets with the capture command, it is possible to trace the lifespan of a packet through the ASA New options were added: persist, bypass-checks, decrypted, transmit, id, and origin.Įnhanced the packet-tracer output to provide specific reasons for packet allow/drop while routing the packets.Įnhanced the packet-tracer command to allow a pcap file as input for tracing. Using this feature, it is possible to trace packets on cluster Support for clustering persistent tracing was introduced. A new trace module for destination MAC address was introduced. Two keyword-argument pairs were added: vlan-id vlan_id and vxlan-inner vxlan_inner_tag. The inline-tag tag keyword-argument pair was added to support the security group tag valueīeing embedded in the Layer 2 CMD header. Only IPv4 fully qualified domain names (FQDNs) are supported. Two keyword-argument pairs were added: user username and fqdn fqdn_ string. The following table shows the modes in which you can enter the command: (Optional) Displays the trace results in XML format. (Optional) Specifies the VLAN identity for the flow. The most recently mapped address for the user (if any) is used Specifies the user identity in the format of domain\user if you want to specify the user as the source IP address. Specifies the ICMP type for an ICMP packet trace. (Optional) Allows simulated packet to transmit from device. Specifies the source IPv4 or IPv6 address for the packet trace. Specifies the source port for a TCP/UDP/SCTP packet trace. Specifies the source and destination security groups based on the IP-SGT lookup for Trustsec. (Optional) Enables tracing for a long term and also tracing in cluster. Specifies the protocol number for raw IP packet tracing, 0-255. The pcap filename that contain the packet for tracing. (Optional) Displays the trace results in JSON format. Specifies the security group tag value being embedded in the Layer 2 CMD header. Specifies the ingress interface of the packet. Ensure to use V6 code for ICMPv6 packet-tracer. Specifies the ICMP code corresponding to the type for an ICMP packet tracer. Ensure to use V6 type for ICMPv6 packet-tracer. Removes existing pcap trace and executes a new pcap file. Specifies the fully qualified domain name of the host, which can be both the source and destination IP address. Port, you may have additional options, including for vxlan and geneveinner packets. Specifies the destination port for a TCP/UDP/SCTP packet trace. Specifies the destination IPv4 or IPv6 address for the packet trace. Output interface selection and also the packet drop due to the unknown destination MAC address. It provides a complete picture of the life of a switched packet by displaying the (Optional) Provides detailed trace results information. (Optional) Considers simulated packet as IPsec/SSL VPN decrypted. (Optional) Bypasses the security checks for simulated packets. Packet-tracer input ifc_name pcap pcap_filename Syntax Description Packet-tracer input ifc_name icmp dst_port You can replay mulitple packets and trace a complete workflow using the pcap keyword. For clarity, the packet-tracer syntax is shown separately for ICMP, TCP/UDP/SCTP, and IP packet modeling. The packet-tracer command can be used in privileged EXEC mode to generate a 5-to-6 tuple packet against a firewall’s currentĬonfigurations.
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