Source not directly connected, tracing source. … and to have more detail about the trace use the ‘detail’ option: Ciscozine-SW1#traceroute mac ip 192.168.0.4 192.168.0.6 detail In the first case, use the command ‘traceroute mac 0019.9955.0f60 0b’ Ciscozine-SW1#traceroute mac 0019.9955.0f60 0b You have two options to find the path between two hosts: Protocol Address Age (min) Hardware Addr Type Interface Total Mac Addresses for this criterion: 6 Suppose to have two host (192.168.0.4, 192.168.0.6) and you would find the layer2 path using the Ciscozine-SW1 Switch.īelow the MAC address table and the ARP table of the Ciscozine-SW1 switch: Ciscozine-SW1#sh mac-address-table dynamic See you the example to understand how this feature works. If you specify source and destination addresses that belong to different VLANs, the Layer 2 path is not identified, and an error message appears.
The traceroute mac command output shows the Layer2 path when the specified source and destination addresses belong to the same VLAN. To do it, Cisco has implemented a good tool: traceroute mac. In a Data Center, it is often required to find a host and the layer2 path. Routers decrement this parameter and discard a packet when the TTL value has reached zero, returning an ICMP error message (ICMP Time Exceeded) to the sender. Tracing the intermediate routers traversed involves control of the time-to-live (TTL) Internet Protocol parameter. Traceroute sends a sequence of Internet Control Message Protocol (ICMP) packets addressed to a destination host.
#CISCO MAC ADDRESS 0000.0C9F. HOW TO#
Have you any guesses why this happens or how to solve it, so I havn't to change the entry if the Server or the Default Gateway (redundant ip) changes.Traceroute is a tool for measuring the route path and transit times of packets across an Internet Protocol (IP) network. we had another IOS version bevor this one and it havn't worked eatherĪs a workaround I could make a static arp entry with the MAC address of the default gateway or the Prime and it will work stable.I already searched for a bug report at the cisco website but havn't found anything about this.there arent any ACLs as the standard - permit line.If I delete the arp entry it will work for a few minutes after that the switch generates the entry seen a few lines above.
It is just for this address (as far as I know) all other devices could ping the switch.For general there wont be any arp entry for the 172.16.2.103 because the traffic will first go to the default gateway.I found out following facts: show arp on 192.168.10.19: Our Stacked Switch (two WS-C2960X-48LPS-L - 15.2(2)E3 - 192.168.10.19 - VLAN 10) wont be reachable via ICMP or SNMP by the Cisco Prime Infrastructure (172.16.2.103 - VLAN1) and back.
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