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Cumulus Linux 2.5.5 What's New


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What's New in Cumulus Linux 2.5.5?
Cumulus Linux 2.5.5 supports these new features:
- netshow has been moved to the main repository in Cumulus Linux
- Integration with Nutanix Prism: View basic Cumulus Linux status information from your Prism GUI
- Stability enhancements to BGP, MLAG and VXLAN

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Cumulus Linux 2.5.5 What's New

  1. 1. v Cumulus® Linux® 2.5.5 What’s New and Different since 2.5.3 (Technical) Last Updated: Dec 14, 2015
  2. 2.  New supported hardware models  Network virtualization LNV, head-end replication, VXLAN active-active mode  Management VRF  IPv6 resilient hashing  BFD enhancements  RMP enhancements  Nutanix monitoring integration  netshow troubleshooting tool December 14, 2015 2 What’s New and Different in Cumulus Linux 2.5.5+2.5.4 vs. 2.5.3
  3. 3. 3 • Penguin 4804iq • Accton AS 4610-54P Hardware Platforms December 14, 2015
  4. 4. Penguin 4804iq December 14, 2015 4 Brand Penguin Type 1 Gigabit Model 4804iq CPU x86 Form Factor 48 x 1G-T and 4 x 10G-SFP+ Switch Silicon Broadcom Helix4 Similar Incumbent Designs Arista 7010T-48, Arista 7048T-A, Cisco Nexus 3048
  5. 5. Edgecore AS4610-54P December 14, 2015 5 Brand Edgecore Type 1 Gigabit – (PoE) Power over Ethernet Model AS4610-54P CPU ARM Form Factor 48 x 1G-POE and 4 x 10G-SFP+ Switch Silicon Broadcom Helix4 Similar Incumbent Designs Cisco Catalyst 3650-48P, Cisco Catalyst 3850-48P, Juniper EX3300-48P
  6. 6. • Service node daemon on spine switches • Each ToR runs a registration daemon • Service nodes load balance via anycast Network Virtualization: LNV December 14, 2015 6 Service node VTEP LNV: Lightweight Network Virtualization • Deploy VXLAN without the need for a central controller in small to medium deployments • Each leaf acts as VTEP (VXLAN tunnel endpoint) How does it work? More info: L3 L2 ECMP
  7. 7. Network Virtualization: Head-end Replication December 14, 2015 7 L3 L2 ECMP Head-end Replication • BUM (Broadcast, Unknown-Unicast and Multicast) traffic is replicated in hardware (Broadcom Trident II) • Used as default configuration for LNV • Eliminates need for complex multicast in underlay network • Trident II supports up to 64 VTEPs 63 additional leaf switches, 3000+ hosts! More info:
  8. 8. Network Virtualization: VXLAN Active-Active Mode December 14, 2015 8 L3 L2 ECMP More info: VXLAN Active-Active Mode • VXLAN within a multi-chassis LAG (MLAG) deployment • Two leaf switches act as one VTEP (for high availability) auto lo iface lo address clagd-vxlan-anycast-ip auto lo iface lo address clagd-vxlan-anycast-ip Leaf 1 Leaf 2
  9. 9. December 14, 2015 9 In band Out of band Management VRF Management Virtual Routing and Forwarding • Enables separation of OOB (out-of-band) management traffic from in band • Equal routes can exist for both OOB and in band OBM Switch More info: cumulus@leaf1$ ip route show table mgmt default via dev eth0 Default Route Default Route
  10. 10. IPv6 Resilient Hashing December 14, 2015 10 More info: • IPv6 parity for IPv4 resilient hashing (released with 2.5.2) • Ensures that when a member in an ECMP group fails, flows on that link are moved to unaffected link while preserving existing flows on unaffected links • 65,536 buckets are created to be shared among all ECMP routes Equal Cost Multipath (ECMP) Load Sharing: Resilient Hashing
  11. 11. December 14, 2015 11 quagga(config)# router bgp X quagga(config-router)# neighbor <neighbor ip> bfd BFD Enhancements quagga(config)# interface X quagga(config-if)# ipv6 ospf6 bfd <2-255> Detect Multiplier <cr> BGP OSPF • BFD support for IPv6 OSPF • BFD IPv4 operational enhancements Bidirectional Forwarding Enhancements More info:
  12. 12. RMP Enhancements  RMP 2.5.5 is the default image for new RMP orders December 14, 2015 12
  13. 13. Nutanix Monitoring Integration December 14, 2015 • q-bridge-mib enhancements for SNMP allows swps to show up in Prism • swp MAC address, swp MTU, unicast, Error and Discard both TX and RX, packet counts are all viewable Prism on Nutanix can see switches running Cumulus Linux
  14. 14. netshow Troubleshooting Tool December 14, 2015 Cumulus Networks Internal & Confidential 14 • netshow aggregates output from both physical interfaces, VLANs, etherchannels as well as helping with troubleshooting spanning tree, MLAG and much more • Can be installed on servers as well More info: cumulus@leaf1$ netshow interface Name Speed Mtu Mode Summary -- ------ ------- ----- -------- -------------------------- UP lo N/A 16436 Loopback IP:, ::1/128 UP eth0 1G 1500 Mgmt IP: (DHCP) netshow tool is installed by default on Cumulus Linux 2.5.5
  15. 15. © 2014 Cumulus Networks. Cumulus Networks, the Cumulus Networks Logo, and Cumulus Linux are trademarks or registered trademarks of Cumulus Networks, Inc. or its affiliates in the U.S. and other countries. Other names may be trademarks of their respective owners. The registered trademark Linux® is used pursuant to a sublicense from LMI, the exclusive licensee of Linus Torvalds, owner of the mark on a world-wide basis. Thank You! 15 Bringing the Linux Revolution to Networking December 14, 2015 Cumulus Networks Internal & Confidential