Cisco WS-X6K-S2-PFC2 Software Guide - Page 88

Example VLAN Trunk Configurations Chapter 5 Configuring Ethernet VLAN Trunks Switch_B> (enable) show trunk Port Mode Encapsulation 3/3 auto dot1q 3/4 auto dot1q 3/5 auto dot1q 3/6 auto dot1q Status -----------trunking trunking trunking trunking Native vlan ----------1 1 1 1 Port -------- 3/3 3/4 3/5 3/6 Vlans allowed on trunk 1-1005, 1025-4094 1-1005, 1025-4094 1-1005, 1025-4094 1-1005, 1025-4094 Port -------- 3/3 3/4 3/5 3/6 Vlans allowed and active in management domain 1-5,10,20,50,152,200,300,400,500,521-524,570,850,917,999 1-5,10,20,50,152,200,300,400,500,521-524,570,850,917,999 1-5,10,20,50,152,200,300,400,500,521-524,570,850,917,999 1-5,10,20,50,152,200,300,400,500,521-524,570,850,917,999 Port Vlans in spanning tree forwarding state and not pruned 3/3 1-5,10,20,50,152,200,300,400,500,521-524,570,850,917,999 3/4 1-5,10,20,50,152,200,300,400,500,521-524,570,850,917,999 3/5 1-5,10,20,50,152,200,300,400,500,521-524,570,850,917,999 3/6 1-5,10,20,50,152,200,300,400,500,521-524,570,850,917,999 Switch_B> (enable) Load-Sharing VLAN Traffic Over Parallel Trunks Example Using spanning tree port-VLAN priorities, you can load-share VLAN traffic over parallel trunk ports so that traffic from some VLANs travels over one trunk, while traffic from other VLANs travels over the other trunk. This configuration allows traffic to be carried over both trunks simultaneously (instead of keeping one trunk in blocking mode), which reduces the total traffic carried over each trunk while still maintaining a fault-tolerant configuration. Figure 5-3 shows a parallel trunk configuration between two switches, using the Fast Ethernet uplink ports on the supervisor engine. 5-16 Catalyst 6000 Family Software Configuration Guide-Releases 6.3 and 6.4 78-13315-02