HP StorageWorks Fabric OS 6.1.1 administrator guide (5697-0235, December 2009)

134 Configuring advanced security features
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 the 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 describes 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).