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12月5日にリリースされた
IOS-XE 3.4.0SG

Catalyst4500-X

Catalyst4500のSup7-E(Supervisor Engine 7-E)、Sup7L-E
にて
VSS(Virtual Switching System )
に対応しました。


Cisco Catalyst 4500-X Series Switches
Release Notes for the Catalyst 4500X Switch, Cisco IOS XE 3.4.xSG

http://www.cisco.com/en/US/docs/switches/lan/catalyst4500/release/note/OL_27989-01.html

Current release
IOS XE 3.4.0SG—December 5, 2012
This release note describes the features, modifications, and caveats for the Cisco IOS XE 3.4.0SG software on the Catalyst 4500-X Series switch,
Cisco IOS XE Software Release 3.4.0SG delivers new software and hardware innovations in campus access and aggregation deployments that span across many technologies including Security, Video, HighAvailability, NetworkVirtualization, IPMulticast and Lower TCO as following:

High Availability
•Virtual Switching System (VSS)
 –Layer 2 Multichassis EtherChannel (MEC)
 –Enhanced Port Aggregation Protocol (ePAgP) split brain detection method
 –Cross-chassis Nonstop Forwarding with Stateful Switchover (NSF/SSO)
 –Cross-chassis in-service software upgrade (ISSU)
 –Support for virtual switch link (VSL) on 1 Gigabit and 10 Gigabit links
 –All four ports on quad supervisor scenario may be used for uplink


Cisco Catalyst 4500 Series Switches
Release Notes for the Catalyst 4500E Series Switch, Cisco IOS XE 3.4.xSG

http://www.cisco.com/en/US/docs/switches/lan/catalyst4500/release/note/OL_27990-01.html

Current release
IOS XE 3.4.0SG—December 5, 2012
This release note describes the features, modifications, and caveats for the Cisco IOS XE 3.4.0SG software on the Catalyst 4500E series switch with Supervisor Engine 7-E and 7L-E.
Cisco IOS XE Software Release 3.4.0SG delivers new software and hardware innovations in campus access and aggregation deployments that span across many technologies including Security, Video, High Availability, Network Virtualization, IP Multicast and Lower TCO as following:

High Availability
•Virtual Switching System (VSS)
 –Layer 2 Multichassis EtherChannel (MEC)
 –Enhanced Port Aggregation Protocol (ePAgP) split brain detection method
 –Cross-chassis Nonstop Forwarding with Stateful Switchover (NSF/SSO)
 –Cross-chassis in-service software upgrade (ISSU)
 –Support for Power over Ethernet (PoE) line card
 –Support for virtual switch link (VSL) on 1 Gigabit and 10 Gigabit links
 –All four ports on quad supervisor scenario may be used for uplink



ちょっとびっくりしたのがVSLに1Gbpsを使えるということです。

VSSを使用するには
Catalyst4500-X,SupervisorEngine7-EIP BASE以上
SupervisorEngine7L-EEnterprise
のイメージが必要になります。
※Cat4500-XはLAN BASEがありませんが。

またCat4500では
WS-X45XX以前のラインカードはサポートされない
とのことです。

Linecards with WS-X45xx and below are not supported in VSS.



また^2 VSSを使用するには
ROMMONのアップグレード
が必要になります。
・Catalyst4500-X

Upgrading the System Software
If you are upgrading to IOS XE Version 3.4.0SG and are planning on using VSS, you must upgrade your ROMMON to IOS Version 15.0(1r)SG7. Else, leave the ROMMON at its default level.

For details on the ROMMON upgrade process, refer to the ROMMON Release Notes for the WS-X45-SUP7-E and WS-C4500X Family of Switches. Be aware that you can upgrade a ROMMON image either through a console or telnet.


・Catalyst4500 Sup7-E/Sup7L-E

Upgrading the System Software
If you are upgrading to Cisco IOS XE Version 3.4.0SG and are planning on using VSS, you must upgrade your ROMMON to IOS Version 15.0(1r)SG7. Otherwise, you must upgrade your ROMMON to at least IOS Version 15.0(1r)SG2.

For details on the ROMMON upgrade process, refer to the ROMMON Release Notes for the WS-X45-SUP7-E and WS-C4500X Family of Switches. Be aware that you can upgrade a ROMMON image either through a console or telnet.

If dual supervisors are present, first upgrade your software to Cisco IOS XE 3.2.0SG or higher, then upgrade your ROMMON to IOS Version 15.0(1r)SG7 to avoid an uplinks issue (CSCtj54375).



また^3 Cat4500-Xの文書にはリリースノート自体に記載があるのですがVSSにすることでStandalone型に比べ以下のような制約があるとのことです。

Features Not Supported on the Cisco Catalyst 4500-X Series Switches
http://www.cisco.com/en/US/docs/switches/lan/catalyst4500/release/note/OL_27989-01.html#wp2612425

With some exceptions, the VSS maintains "feature parity" with the standalone Catalyst 4500 or 4500-X series switches. Major exceptions include:
 -CFM D8.1
 -Dot1q Tunnel ("legacy/classic" dot1q tunnel)
 -Dot1q tunneling and L2PT (Layer 2 Protocol Tunneling)
 -Energywise
 -Fast UDLD
 -Flexlink
 -Mediatrace (Medianet active video monitoring feature)
 -Metadata (Medianet feature)
 -Per VLAN Learning
 -REP and associated featurettes
 -UDE
 -UDLR
 -VLAN Translation (1:1 and 1:2-Selective QinQ)
 -VMPS Client
 -WCCP

Cat4500についてはConfiguration Guideのリンクがあります。
で、書いてあることは同じです。

Features Not Supported on the Cisco Catalyst 4500E Series Switch
http://www.cisco.com/en/US/docs/switches/lan/catalyst4500/release/note/OL_27990-01.html#wp2563867

The following features are not supported on a Catalyst 4500E Series Switch with Supervisor Engine 7-E and Supervisor Engine 7L-E:

 -CISCO-IETF-IP-FORWARD-MIB
 -CISCO-IETF-IP-MIB
 -LLDP HA
 -WCCP Version 1

For a list of key features not supported on VSS, refer to the "Software Features" section.




追記。

VSS対応についてちゃんと書いてある資料がありました。英語ですが。

Cisco IOS XE Software Release 3.4.0SG and Cisco IOS Software Release 15.1(2)SG for Cisco Catalyst 4500E, 4500-X, and 4900 Series Switches
Software Features
Cisco Virtual Switching System (VSS) for Cisco Catalyst 4500E (Supervisor Engine 7-E and 7L-E) and 4500X Series Switches
http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps4324/product_bulletin_c25-723408_ps12332_Products_Bulletin.html

地味に重要なのが
Layer3 MEC のサポートが現段階ではされていない
ということでしょうか。

The following are the primary VSS features supported in Release 3.4.0SG:
 - Layer 2 MEC
 - Enhanced Port Aggregation Protocol (ePAgP) split brain detection method
 - Cross-chassis Nonstop Forwarding with Stateful Switchover (NSF/SSO)
 - Cross-chassis in-service software upgrade (ISSU)
 - Support for Power over Ethernet (PoE) line card
 - Support for virtual switch link (VSL) on 1 Gigabit and 10 Gigabit links
 - All four ports on quad supervisor engine scenario may be used for uplink

The following features are available in standalone mode only and not available in VSS mode:
 - VLAN Management Policy Server (VMPS) client
 - Unidirectional Ethernet (UDE)
 - CFM draft 8.1
 - Resilient Ethernet Protocol (REP)
 - Flexlinks
 - Per-VLAN MAC learning (PVL)
 - Fast unidirectional link detection (UDLD)
 - Web Cache Communication Protocol (WCCP)
 - dot1Q tunnel and VLAN translation (1:1, 2:1, and 802.1Q tunneling [QinQ])
 - Mediatrace and metadata
 - Cisco EnergyWise™



追記の追記。
本文も訂正しましたが、
SupervisorEngine7L-Eの場合は
Enterprise
にする必要がありました。記載は上の追記の文書内にありますが、再掲。
Cisco IOS XE Software Release 3.4.0SG and Cisco IOS Software Release 15.1(2)SG for Cisco Catalyst 4500E, 4500-X, and 4900 Series Switches
Hardware Features
Support for Cisco 10GBASE-T X2 Pluggable Module for Cisco Catalyst 4500E and 4900M
Table 1. Matrix of Supported Features

http://www.cisco.com/en/US/prod/collateral/switches/ps5718/ps4324/product_bulletin_c25-723408_ps12332_Products_Bulletin.html#wp9000288


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