HP A7533A HP StorageWorks Fabric OS 6.1.x administrator guide (5697-0234, Nove - Page 133
Notes on joining a switch to the fabric
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Notes on joining a switch to the fabric When a switch is joined to a fabric with a tolerant SCC or DCC fabric-wide consistency policy, the joining switch must have a matching tolerant SCC or DCC fabric-wide consistency policy. If the tolerant SCC or DCC fabric-wide consistency policies do not match, the switch can join the fabric, but an error message flags the mismatch. If the tolerant SCC and DCC fabric-wide consistency policies match, the corresponding SCC and DCC ACL policies are compared. The enforcement of fabric-wide consistency policy involves comparison of only the Active policy set. If the ACL policies match, the switch joins the fabric successfully. If the ACL policies are absent on the switch or on the fabric, the switch joins the fabric successfully, and the ACL policies are copied automatically from where they are present to where they are absent. The Active policies set where they are present overwrite the Active and Defined policies set where they are absent. If the ACL policies do not match, the switch can join the fabric, but an error message flags the mismatch. Under both conflicting conditions, secPolicyActivate is blocked in the merged fabric.Use fddcfg -fabwideset command to resolve the fabric-wide consistency policy conflicts. Use the distribute command to explicitly resolve conflicting ACL policies. When a switch is joined to a fabric with a strict SCC or DCC fabric-wide consistency policy, the joining switch must have a matching fabric-wide consistency policy. If the strict SCC or DCC fabric-wide consistency policies do not match, the switch cannot join the fabric and the neighboring E_Ports will be disabled. If the strict SCC and DCC fabric-wide consistency policies match, the corresponding SCC and DCC ACL policies are compared. The enforcement of fabric-wide consistency policy involves comparison of only the Active policy set. If the ACL polices match, the switch joins the fabric successfully. If the ACL policies are absent either on the switch or on the fabric, the switch joins the fabric successfully, and the ACL policies are copied automatically from where they are present to where they are absent. The Active policy set where it is present overwrites the Active and Defined policy set where it is absent. If the ACL policies do not match, the switch cannot join the fabric and the neighboring E_Ports are disabled. Use the fddcfg -fabwideset command on either this switch or the fabric to set a matching strict SCC or DCC fabric-wide consistency policy. Use ACL policy commands to delete the conflicting ACL policy from one side to resolve ACL policy conflict. If neither the fabric nor the joining switch is configured with a fabric-wide consistency policy, there are no ACL merge checks required. The descriptions above also apply to joining two fabrics. In this context, the joining switch becomes a joining fabric. Matching fabric-wide consistency policies This section describe the interaction between the databases with active SCC and DCC policies and combinations of fabric-wide consistency policy settings when fabrics are merged. For example: Fabric A with SCC:S;DCC (strict SCC and tolerant DCC) joins Fabric B with SCC:S;DCC (strict SCC and tolerant DCC), the fabrics can merge as long as the SCC policies match (both are strict). Table 37 describes the impact of merging fabrics with the same fabric-wide consistency policy that have SCC, DCC, or both policies. Table 37 Merging fabrics with matching fabric-wide consistency policies Fabric-wide Fabric A consistency policy ACL policies Fabric B ACL policies Merge results Database copied None None None None SCC/DCC Succeeds No ACL policies copied. Succeeds No ACL policies copied. Fabric OS 6.1.x administrator guide 133