Extreme Data Center (VOSS/VSP) flashcards
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32 cards. Read the term and the definition here. The deck at the top of this page is optional.
- What is VOSS?
- Versatile Operating System: the Linux-based modular network OS that runs on Extreme VSP switches, providing CLI, Fabric Connect, routing, and HA features.
- What is a VSP?
- Virtual Services Platform: Extreme's family of data-center and campus switches (4000, 7000, 8000, 9000) that run VOSS and support Fabric Connect and SPB.
- What is Fabric Connect?
- Extreme's implementation of SPB that separates service from transport, using I-SIDs for services and IS-IS SPB for the backbone, enabling automated provisioning.
- Spine-leaf topology
- A two-tier data-center design where every leaf switch connects to every spine switch; SPB IS-IS runs on all fabric links to build shortest-path trees.
- VSP partition mode
- A boot-time setting that configures a VSP chassis as either a single 4-slot switch or two independent 2-slot virtual switches, affecting port numbering and HA.
- Default management IP
- Factory-default VSP switches use 192.168.10.1/24 on the dedicated Management port for out-of-band access before in-band management is configured.
- Save configuration command
- Use 'save config' or 'copy running-config startup-config' to persist changes; unsaved changes are lost on reload. Compare with 'show running-config' and 'show startup-config'.
- Software upgrade procedure
- Download the image with 'download' from TFTP/FTP/SFTP, verify with 'show boot', then 'boot' from the new image. Confirm with 'show software'.
- NTP configuration
- Configure with 'ntp server <ip>' and verify with 'show ntp status'. Accurate time is required for certificate validation, log correlation, and troubleshooting.
- Syslog configuration
- Configure with 'logging host <ip>' and 'logging severity <level>'; use 'logging buffered' for local storage. Verify with 'show logging'.
- Enabling Fabric Connect
- Enable globally with 'fabric enable', create an IS-IS instance with 'router isis', and configure 'spbm' under the IS-IS instance to form the SPB backbone.
- What is Auto-Sense?
- A Fabric Attach feature that automatically detects clients on access ports and assigns them to services without manual VLAN/I-SID provisioning. Enable with 'auto-sense enable'.
- Fabric Attach protocol
- An IEEE 802.1Qcj client/server protocol over LLDP that lets access devices request VLAN/I-SID element assignments from the Fabric Attach server (the VSP).
- Zero-touch auto-configuration
- A boot process where DHCP options 66/67 point a new switch to a configuration server, which downloads and applies a configuration on first boot.
- IS-IS NET address
- The Network Entity Title used by IS-IS; the system ID is derived from the chassis MAC and must be unique per node in the fabric.
- What is SPB?
- Shortest Path Bridging (IEEE 802.1aq) uses IS-IS to compute shortest paths and install unicast and multicast forwarding entries for all I-SIDs across the fabric.
- B-VLAN in SPB
- The backbone VLAN that carries SPB transport traffic. It must be consistent across the fabric; the primary B-VLAN carries unicast and multicast.
- SPB nickname
- A unique identifier for an SPB node, derived from the system ID by default or set with 'spbm nickname <value>'; nicknames must be unique in the fabric.
- SPB ECMP
- Equal-cost multipath in SPB is automatic across equal-cost spine paths; traffic is hashed across available paths for load sharing.
- What is an I-SID?
- A fabric-wide service identifier (1-16777215) that maps VLANs across the SPB backbone. The same I-SID is configured on every edge switch in the service.
- L2 VSN provisioning
- Create a VLAN, enable 'i-sid <id>' under it, then bind it to the SPBM instance with 'spbm i-sid <id> vlan <vid>'. Repeat on every edge switch.
- VLAN vs I-SID
- A VLAN is a local Layer 2 broadcast domain on one switch; an I-SID is a fabric-wide service identifier that extends a service across the SPB backbone.
- VLAN translation
- A VSP feature that maps an ingress VLAN to a different internal VLAN before I-SID mapping, useful for connecting external networks with different VLAN schemes.
- What is an L3 VSN?
- A routed service over SPB with its own VRF and IP subnet; configured with 'i-sid <id>' plus 'vrf <name>' under the IS-IS SPBM instance.
- VRF configuration
- Create with 'ip vrf <name>' and assign interfaces with 'ip vrf forwarding <name>' under the interface. VRFs are isolated by default.
- DHCP relay
- Configure with 'ip dhcp-relay' and 'ip dhcp-relay fwd-path <server-ip>' to forward DHCP requests from a client subnet to a centralized DHCP server.
- VRRP on VSP
- First-hop redundancy configured with 'ip vrrp <vrid> address <ip>' on an SVI; verify with 'show ip vrrp'. Provides a redundant default gateway.
- What is SMLT?
- Split Multi-Link Trunking: Extreme's MC-LAG technology where two aggregation switches form an IST and present a single logical LAG to access switches.
- IST in SMLT
- The inter-switch trunk that carries control traffic between SMLT peers. Configure with 'interface ist' and 'ist' under the peer switches; verify with 'show ist'.
- What is RSMLT?
- Routed SMLT: provides redundant L3 gateways across SMLT peers; both peers answer ARP and forward traffic, eliminating suboptimal routing.
- BFD on VOSS
- Bidirectional Forwarding Detection accelerates failure detection for OSPF, BGP, and IS-IS. Enable with 'bfd enable' and per-protocol 'bfd'.
- show tech command
- Collects a full diagnostic bundle (config, logs, counters) for support cases; 'show tech <module>' narrows the output to a specific area.