VSS (Virtual Switch System) est une technologie de virtualisation de switch Cisco.
Le switch viruel 1440 (VSS1440) est composé de 2 switch Cisco Catalyst 6500 interconnectés par un lien VSL (Virtual Switch Link)
Une carte Supervisor 720-10GE est utilisé par châssis 6500.
Le lien VSS est assuré par les interfaces 10To de la carte Sup.
La distance entre 2 membres du VSS varie entre 15m et 80km, en fonction des modules 10To utilisés (cuivre ou optique):
- X2-10GB-CX4: 15m
- X2-10GB-LX4: 300m
- X2-10GB-SR: 26m (FDDI grade MMF), 300M with OM3 MMF)
- X2-10GB-LR: 10km
- X2-10GB-ER: 40km
- X2-10GB-LRM: 220m over MMF
- X2-10GB-ZR: 80km
Le lien VSL est un port channel pouvant être composé de 2 à 8 liens,
Le lien VSL assure la synchronisation des 2 membres, il transporte les informations de contrôle et les données.
un châssis obtient le rôle « Active », l’autre le rôle « Standby ».
L’architecture VSS permet d’assurer les fonctions suivantes :
- stateful switchover (SSO)
- nonstop forwarding (NSF).
- lien MEC – Multichassis EtherChannel
User Actions :
6K500-VSS#show switch virtual Switch mode : Virtual Switch Virtual switch domain number : 110 Local switch number : 1 Local switch operational role: Virtual Switch Active Peer switch number : 2 Peer switch operational role : Virtual Switch Standby
6K500-VSS#show switch virtual link VSL Status : UP VSL Uptime : 3 years, 5 weeks, 4 days, 22 hours, 53 minutes VSL SCP Ping : Pass VSL ICC Ping : Pass VSL Control Link : Te1/5/5
6K500-VSS#show switch virtual role Switch Switch Status Preempt Priority Role Session ID Number Oper(Conf) Oper(Conf) Local Remote ------------------------------------------------------------------ LOCAL 1 UP FALSE(N ) 110(110) ACTIVE 0 0 REMOTE 2 UP FALSE(N ) 100(100) STANDBY 6444 6146 In dual-active recovery mode: No
show switch virtual redundancy
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show redundancy
6K500-VSS#show redundancy Redundant System Information : ------------------------------ Available system uptime = 3 years, 5 weeks, 4 days, 22 hours, 55 minutes Switchovers system experienced = 0 Standby failures = 0 Last switchover reason = none Hardware Mode = Duplex Configured Redundancy Mode = sso Operating Redundancy Mode = sso Maintenance Mode = Disabled Communications = Up Current Processor Information : ------------------------------- Active Location = slot 1/5 Current Software state = ACTIVE Uptime in current state = 3 years, 5 weeks, 4 days, 22 hours, 54 minutes Image Version = Cisco IOS Software, s72033_rp Software (s72033_rp-ADVIPSERVICESK9_WAN-M), Version 12.2(33)SXI2a, RELEASE SOFTWARE (fc2) Technical Support: http://www.cisco.com/techsupport Copyright (c) 1986-2009 by Cisco Systems, Inc. Compiled Wed 02-Sep-09 00:59 by prod_rel_team BOOT = sup-bootdisk:s72033-advipservicesk9_wan-mz.122-33.SXI2a.bin,1; Configuration register = 0x2102 Peer Processor Information : ---------------------------- Standby Location = slot 2/5 Current Software state = STANDBY HOT Uptime in current state = 3 years, 5 weeks, 4 days, 22 hours, 50 minutes Image Version = Cisco IOS Software, s72033_rp Software (s72033_rp-ADVIPSERVICESK9_WAN-M), Version 12.2(33)SXI2a, RELEASE SOFTWARE (fc2) Technical Support: http://www.cisco.com/techsupport Copyright (c) 1986-2009 by Cisco Systems, Inc. Compiled Wed 02-Sep-09 00:59 by prod_rel_team BOOT = sup-bootdisk:s72033-advipservicesk9_wan-mz.122-33.SXI2a.bin,1; Configuration register = 0x2102