Cisco Cisco IOS XE 3.5E 發佈版本通知

LACP Min-Links

Allows you to specify the minimum number of active ports that must be in the 
link-up state and bundled in an EtherChannel for the port channel interface to 
transition to the link-up state. 

(IP Base and Enterprise Services)

Link State Group

The upper limit of the link state group number value is now increased (from 10) to 
20. You can configure upto 20 link state groups per switch.

(IP Base and Enterprise Services)

Named VLAN 

Option to specify a VLAN name for access and voice VLAN.

(IP Base and Enterprise Services)

Policy-Based Routing (PBR) with 
Object Tracking 

Support for a new command set ip next-hop verify-availability, to use PBR with 
object tracking, to verify the reachability of the next-hop IP address to which to 
forward packets, using an Internet Control Message Protocol (ICMP) ping as the 
verification method. This feature is supported only on IPv4 PBR and is not 
supported on IPv6 PBR, and PBR on VSS and VRF.

(IP Base and Enterprise Services)

Rapid  PVST+  as  Default 

Rapid PVST+ is now the default spanning-tree mode used on all Ethernet port-based 
VLANs. 

(IP Base and Enterprise Services)

Resilient Ethernet Protocol (REP) 
Enhancements 

Option to configure an administrative VLAN for each segment. This allows you to 
configure any number of administrative VLANs as long as it is per segment. 

(IP Base and Enterprise Services)

Spanning Tree Protocol (STP) 
Enhancements

Bridge Assurance—Protects the network from bridging loops that are caused by 
unidirectional links, or a malfunctioning switch. Bridge Assurance is enabled by 
default, and applies only to PortFast network ports.

Detecting UniDirectional Link Failures (or the STP Dispute Mechanism)—The 
switch port detects unidirectional link failures by checking the consistency of the 
port role and state of the BPDUs received. When a conflict is detected, the 
designated port reverts to a blocking state. This feature does not require any user 
configuration.

PVST+ Simulation—This is now user-configurable. You can enable or disable this 
feature per port, or globally. PVST+ simulation is enabled by default. It allows 
seamless interoperability between MST and Rapid PVST+. 

(IP Base and Enterprise Services)

Storm Control Enhancements 

Option to specify the threshold level for broadcast traffic in bits per second (bps) 
and packets per second (pps). 

(IP Base and Enterprise Services)

UDP Forwarding Support for IP 
Redundancy Virtual Router Group 

UDP broadcast is now limited to the active router in the Virtual Router Group 
(VRG). Only a VRG that is implemented with the Hot Standby Routing Protocol 
(HSRP) is supported

(IP Base and Enterprise Services)