Cisco Cisco IOS XE 3.5E

The maximum MTE supported on Catalyst 4500 switches is 8000, per direction.

Although the show memory command is supported on Catalyst 4500 series switches, the CLI output 
for the command shows the value 0 for the config total, on Catalyst 4500 series switches using a 
daughter card on Supervisor Engine 7-E. This issue is, however, not seen on switches with 
Supervisor Engine 7-E baseboard. (CSCup28930)

When you install the GLC-T (1000Base-T) SFP transceiver,  10/100 Mbps with auto negotiation is 
not supported.

When you use the GLC-GE-100FX module between a Cisco Catalyst 4500-X switch and a Cisco 
Catalyst 2000 or 3000 series switch, traffic does not flow after the first time you change the interface 
from half duplex to a full duplex. 

Workaround: You have to enter the shutdown and then the no shutdown interface configuration 
command for traffic flow to resume. (CSCus14532)

The system allows you to delete policy maps related to these Auto QoS profiles: 

Auto QoS enterprise

Auto QoS guest

Auto QoS voice

The problem is seen on a Catalyst 4500 series switch running Cisco IOS-XE release 3.7.0E, when 
you configure QoS using Auto Qos and you try to delete an Auto QoS profile related policy map.

Workaround: To recover the deleted policy-map, remove all the policies related to that profile, 
remove Auto QoS configuration from the WLAN, and then reconfigure Auto QoS.

VSS: Do not use SVLAN for routing in SP network on ingress switch (where the mapping is 
present). This is not a valid scenario.

Starting with Release IOS XE 3.3.0SG, the seven RP restriction was removed.

More than 16K QoS policies can be configured in software. Only the first 16K are installed in 
hardware.

Adjacency learning (through ARP response frames) is restricted to roughly 1000 new adjacencies 
per second, depending on CPU utilization. This should only impact large networks on the first 
bootup. After adjacencies are learned they are installed in hardware.

Multicast fastdrop entries are not created when RPF failure occurs with IPv6 multicast traffic. In a 
topology where reverse path check failure occurs with IPv6 multicast, this may cause high CPU 
utilization on the switch.

The SNMP ceImageFeature object returns a similar feature list for all the three license levels (IP 
Base and EntServices). Although the activated feature set for a universal image varies based on the 
installed feature license, the value displayed by this object is fixed and is not based on the feature 
license level.

Performing an ISSU from a prior release to IOS XE 3.6.0E is not supported.

Standard TFTP implementation limits the maximum size of a file that can be transferred to 32 MB. 
If ROMMON is used to boot an IOS image that is larger than 32 MB, the TFTP transfer fails at the 
65,xxx datagram.