Appendix A Network ports and protocols
PS Series groups use a number of TCP and UDP protocols for group management, I/O operations, and
internal communication. If you have switches or routers set to block these protocols, you may need to
unblock them to allow management or I/O operations to work correctly. The required and optional
protocols are listed in the following sections.
A.1 Required ports and protocols
Table 49 lists the ports and protocols required for operating an EqualLogic iSCSI SAN.
Table 49 Required ports and protocols
Type
Port
TCP
3260
UDP
161
TCP
9876
TCP
25555
TCP
20002
A.2 Optional ports and protocols
Table 50 lists the optional ports and protocols used for management and alerts. They are not required
for correct array operation.
March 2013
Protocol
Access
To the group IP address and all individual member IP
iSCSI
addresses
EqualLogic Internal
SNMP
Management operations
Internal
iSCSI intra-system control
Internal
Group communication
Internal
Event logging
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iSCSI
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