HP Cisco MDS 9216i Cisco MDS 9000 Family Fabric Manager Configuration Guide - - Page 309

Chapter 13 Using the CFS Infrastructure CFS Distribution over IP Send documentation comments to [email protected] Figure 13-3 Network Example 2 with Fibre Channel and IP Connections Node A Node B Node C Node E 144861 FC Node D IP Figure 13-4 is the same as Figure 13-3 except that node D and node E are connected using IP. Both node C and node D forward the event to E because the node E is not in the distribution list from node B. Figure 13-4 Network Example 3 with Fibre Channel and IP Connections Node A Node B Node C Node E 144862 FC Node D IP Configuring Static IP Peers for CFS over IP Multicast forwarding is disabled by default in some devices. For example, IBM Blade chassis has multicast forwarding disabled, especially on external ethernet ports and there is no method to enable it. NPV devices use only IP as the transport medium and do not have ISL connectivity or FC domain. To enable CFS over IP on the switches that do not support multicast forwarding, multicast forwarding has to be enabled on the ethernet IP switches all along the network that physically connects the switch. In such cases, you can configure static IP peers for CFS distribution over IP. CFS uses the list of configured IP addresses to communicate with each peer and learn the peer switch WWN. After learning the peer switch WWN, CFS marks the switch as CFS-capable and triggers application-level merging and database distribution. The following MDS 9000 features require static IP peer configuration for CFS over IP distribution: • N port virtualization devices have IP as the communication channel because NPV switches do not have FC domain. NPV devices use CFS over IP as the transport medium. For more information, see the "NPV CFS Distribution over IP" section on page 21-5. • FlexAttach virtual pWWN distribution on CFS region 201 that links only the NPV-enabled switches. For more information, see the "FlexAttach Virtual pWWN CFS Distribution" section on page 14-9. Cisco MDS Fabric Manager discovers NPV devices by reading the name server database on the NPV core switch, which is also used to manage the static peer list at an NPV switch for CFS distribution over IP using static peers. Fabric Manager 4.1(1) and later provides a one-time configuration wizard to manage the peer list of the discovered NPV peers on a switch. When the peer list is cofigured on a switch, CFS enables distribution using the IP static peers on all members of the list and propagates the peer list to all members on the list. OL-17256-03, Cisco MDS NX-OS Release 4.x Cisco MDS 9000 Family Fabric Manager Configuration Guide 13-11