#Mac address learning in rspan mac

#Mac address learning in rspan mac

However, disabling MAC address learning will waste link bandwidth, especially when there are a large number of access users.įigure 8-25 Layer 2 remote port mirroring fails when mirrored packets from different source MAC addresses are forwarded in the same VLANĪs shown in Figure 8-25, a company configures Layer 2 remote port mirroring on SwitchA and SwitchC to monitor communication traffic between the R&D and marketing departments.

If the original service traffic and mirrored traffic need to be forwarded in the same VLAN, run the mac-address learning disable command to disable MAC address learning in this VLAN (VLAN 10 in this example). Use different VLANs to forward the original service traffic and mirrored traffic, as shown in Figure 8-24. The mirrored packets cannot reach the monitoring server, and Layer 2 remote port monitoring fails. Therefore, SwitchB forwards the mirrored packets that it receives in VLAN 10 according to the learned The devices between HostA and the DNS server all learn the MAC address entry matching the DNS server.

Of the DNS server as the destination MAC address. The mirrored packets and original packets all use the MAC address When SwitchA receives the packets sent from HostA to the DNS server, it copies the packets and forwards the mirrored packets in VLAN 10. Mirrored traffic are both forwarded through VLAN 10. Figure 8-23 Layer 2 remote port mirroring fails when the original service traffic and mirrored traffic are forwarded in the same VLANĪs shown in Figure 8-23, a company configures Layer 2 remote port mirroring on SwitchA to monitor the traffic sent from employees in the R&D department to the DNS server.