Extreme Networks


  • BlackDiamond: Chassis-based high-port density switches for Carrier-Ethernet service providers and enterprise core
  • Summit: Standalone switches from L2 100Mbps to L3 10Gig top-of-rack datacenter switches.
  • ReachNXT: Port Extender - Manageable by an access switch via XOS
  • SummitWM: Wireless controllers
  • Altitude: Wireless Access Points
  • Sentriant NG: Intrusion Protection System (IPS)
  • Sentriant AG: Network Access Controller (NAC)


  • ExtremeWare is VxWorks based = first generation of Extreme networks operating system
  • ExtremeXOS = 2nd Generation OS based on Linux kernel and BusyBox
  • EPICenter = Network Management Tool


Switch CLI prompt is driven from SNMP host name value

Space bar to go to BootROM: for return to factory default configuration: config none

Extreme FDB = Forwarding Database for MAC addresses - 300 Sec Aging timer per MAC

IP FDB (L3) for IP forwarding

    show iparp
    show fdb
    create fdbentry
    delete fdbentry
    disable learning
    enable learning
 # configure ports 1 vlan accounting unlimited-learnings
 # configure ports 1 vlan accounting learning-limit 3 (use aging timer also) (only for dynamic entries)

Lock-learning (sticky mac)

# configure ports 1 vlan VLAN1 lock-learning 
# configure ports 1 vlan VLAN1 unlock-learning
    show vlan default security

gets link status from other-end

    enable elsm ports
    disable elsm ports
    configure elsm ports
    clear elsm ports


 1. Port-based
 2. 802.1Q Tagged VLAN
 3. Protocol-based VLAN
              create vlan vlan_name
              delete vlan vlan_name
              configure vlan vlan_name add ports
              configure vlan vlan_name delete ports
              disable vlan vlan_name
              enable vlan vlan_name
              configure vlan vlan_name tag <tag_value>
              configure vlan default delete port 7
              configure vlan ENGINEERING add port 7 untagged
              configure vlan ENGINEERING add ports 2,3 tagged
              show vlan ENGINEERING 
              BPDU –> vlan0

Port Sharing (Aggregation) LAG

  enable sharing 1 grouping 1-4 algorithm address-based lacp
  show port sharing

Port Settings

 enable lldp port all
 show ports configuration no-refresh
 enable jumbo-frame ports all
 show vlan VLAN1 security
  • spanning-tree is disabled by default
  • EMI-STP Encapsulation - Extreme Multi Instance Spanning Tree - VST+ additional header

EAPS - Ethernet Automatic Protection Switching (Ring)

  • Ring Topology
  • L2 Protocol - Multicast MAC
  • EAPS version 2 (advanced feature - EAPS shared port for preventing superloop)
  • 50 ms failover
  • Device Roles: Master node, Transit nodes
  • Primary/secondary port on each switch
  • Master blocks its secondary port
  • Control VLAN and Protected VLAN (one Control VLAN per EAPS domain)
  • EAPS flush FDB when there's a topology change
        create vlan control_vlan_name 
   configure vlan control_vlan_name tag vlan_tag 
   configure vlan control_vlan_name add port <primary.secondary> tagged
        create eaps <name>
        configure eaps <name> mode master|transit
        configure eaps <name> primary port <port number>
        configure eaps <name> secondary port <port number>
        configure eaps <name> add control vlan control_vlan_name
        configure eaps <name> add protect vlan <name>
        enable eaps
        enable eaps <name>
        configure eaps fast-convergence [off|on] -> additional 250ms
        configure eaps name failtime expiry-action open secondary-port > by default sends alert!

EAPS with a Shared Port

  • Configure partner
  • Configure controller port
  • link-id must be same on both switches


  • Should have same image:

download image <ip> <file> slot <slot-number>

  • 40Gbps full duplex capacity per switch
  • MAX: 8 devices
              enable stacking
              show stacking
              show stacking configuration
              configure stacking easy-setup

IP Routing

  • By default is disabled

enable ipforwarding

        configure iproute add x.x.x.x/x y.y.y.y
        show ipconfig
  * In new vlan ip forwarding might be disabled make sure to check.
        show iproute
        show ipstats
  * icmp is enabled by default


  enable ipforwarding
  configure ospf routerid
  enable loopback vlanname (if you want to have loopback)
  configure ospf address VLAN1 area
  configure ospf address VLAN2 area
  enable ospf
  show ospf
  show ospf area
  show ospf neighbors
  show ospf lsdb
  • Redistribution is disabled and is configurable by policy files.
  • Core license required for OSPF DR/BDR function.
  • on edge / advanced edge license: we can not have DRs so priority:0


Extreme Standby Routing Protocol - ESRP is extreme protocol for redundancy something like VRRP


  • No much QOS support
  • Traffic shaping is called metering
  • 8 queue per interface
  • Queue 1 and 8 are used by default (2q)

Useful hints

Password Recovery procedure

  1. reboot & press spacebar
  2. The option you want to choose is to select the primary code image by hitting 1
  3. After the primary image is selected select k to erase selected configuration
  4. Choose d to force default configuration and then f to boot on board flash.
  5. After your Extreme switch resets and you are prompted with a login enter in admin, hit enter twice entering a blank password at the password prompt.

Synchronizing (images, configurations) between MSM slots

 BD6808:2 # synchronize 
 Synchronization will reset slave MSM.
 Are you sure you want to synchronize MSM code images, 
 configurations, and bootrom [y/n]?y  
 Copying primary code image.................................................................... 



configure sys-health-check alarm-level Log
configure fdb-scan period 60
configure fdb-scan failure-action sys-health-check
enable fdb-scan slot 1
enable fdb-scan slot 2
enable fdb-scan slot 3
enable fdb-scan slot 4
enable fdb-scan slot 5
enable fdb-scan slot 6
enable fdb-scan slot 7
enable fdb-scan slot 8
enable fdb-scan slot MSM-A
enable fdb-scan slot MSM-B
extreme.txt · Last modified: 2011/01/30 16:34 by a
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