3-12 Installation and Troubleshooting Guide' Pressing while VC Link Ctl is selected displays the virtual channel link con-trol channel.The Virtual Channel Link Control changes the link control channel. There are twooptions: 0 and 1.Option 0 forces data receipt acknowledgments on Class 2 channels to be sent backon the data channel. This traffic consumes a portion of the available data channelbandwidth.Option 1 allows data receipt acknowledgment packets to use the VD-1 (internalswitch traffic channel) which frees additional bandwidth in the data channel, and trans-fers the data receipt traffic load to the switch’s internal traffic channel.' )Pressing while VC Class 2 is selected displays the virtual channel 2 setting.You can select the default channel of 2, but you can also select virtual channel 3, 4,or 5.' *Pressing while VC Class 3 is selected displays the virtual channel 3 setting.You can select the default channel as 3, but you can select virtual channel 2, 4, or 5.' ( Pressing while VC Multicast is selected displays the virtual channel multi-cast channel.You may change the multicast transmission channel to either virtual channel 6 or 7.Verify that the multicast channel has the frame class priority set to the frame class ofthe expected traffic.' Pressing while VC Muticast is selected displays the priorities assigned toeach of the switch’s virtual channels. Positions 1 and 2, starting at the left of the dis-play, are fixed and display 0 or 1.The first position, a 0 ,shows and indicates that this virtual channel, assigned to han-dle internal switch traffic, has the highest priority. This priority value cannot bechanged by the user.The second position, indicated by a 1, shows the priority assigned by the virtual chan-nel link control as described in the “VC Link Ctl” section.The third through eighth positions can have only a 2 or a 3 indicating that the channelgives priority to either Class 2 frame traffic or to Class 3 frame traffic.
