Cisco Cisco IOS Software Release 15.2(3)E 릴리즈 노트

Cross-stack QoS to enable QoS configuration across the entire stack.

802.1p class of service (CoS) and differentiated services code point (DSCP) field classification are 
provided, using marking and reclassification on a per-packet basis by source and destination IP 
address, MAC address, or Layer 4 TCP/UDP port number.

For standalone (non-stacked) setup, up to 8 egress queues per port and strict priority queuing, and 
finer flow segregation using 3 threshold markers for non-strict-priority queues.

Shaped Round Robin (SRR) scheduling to ensure differential prioritization of packet flows. 

Strict priority queuing to ensure that the highest-priority packets are serviced ahead of all other 
traffic.

Flow-based rate limiting and up to 256 aggregate or individual policers per port. 

IP unicast routing protocols (Static, Routing Information Protocol Version 1 (RIPv1), and RIPv2 are 
supported for small-network routing applications. 

Advanced IP unicast routing protocols (OSPF for routed access) are supported for load balancing 
and constructing scalable LANs. IPv6 routing (OSPFv3) is supported in hardware for maximum 
performance. 

Equal-cost routing facilitates Layer 3 load balancing and redundancy across the stack.

Policy-based routing (PBR) allows superior traffic control by providing flow redirection regardless 
of the routing protocol configured. 

Hot Standby Routing Protocol (HSRP) and Virtual Router Redundancy Protocol (VRRP) provides 
dynamic load balancing and failover for routed links. 

Protocol Independent Multicast (PIM) for IP multicast is supported, including PIM sparse mode 
(PIM-SM), PIM dense mode (PIM-DM), PIM sparse-dense mode, and Source Specific Multicast 
(SSM).

Starting with Cisco IOS Release 15.2(5)E, Secure Shell (SSH) Version 1 is deprecated. Use SSH 
Version 2 instead.

Although you can configure up to 1,024 VLANs in a mixed stack configuration where the Catalyst 
2960-S is the stack master, configuring more than 255 VLANs can cause the stack master to 
unexpectedly reload. (CSCue82689) 

In a stackable switch, if the VRF configuration is changed and this is followed by a master 
switchover, the VRF stops working. The workaround is to reload the switch stack after the VRF 
configuration is changed. (CSCtn71151)

The 250-W power supply is not supported in any PoE switch. The 640-W power supply is not 
supported in a full PoE switch. If you insert an unsupported power supply, the following error 
message is displayed:

%PLATFORM_ENV-1-FRU_PS_ACCESS: UNKNOWN or UNSUPPORTED Power Supply