This document summarizes the new features and changes in Cumulus Linux version 2.5.5, including support for new hardware platforms, enhancements to network virtualization functionality like LNV and VXLAN, a new management VRF, IPv6 resilient hashing, BFD enhancements, RMP enhancements, integration with Nutanix monitoring, and a new netshow troubleshooting tool.

1. v
Cumulus®
Linux®
2.5.5
What’s New and Different since 2.5.3 (Technical)
Last Updated: Dec 14, 2015

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
cumulusnetworks.com

3. 3
• Penguin 4804iq
• Accton AS 4610-54P
Hardware Platforms
December 14, 2015 cumulusnetworks.com

4. Penguin 4804iq
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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
cumulusnetworks.com

5. Edgecore AS4610-54P
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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
cumulusnetworks.com

6. • Service node daemon on spine switches
• Each ToR runs a registration daemon
• Service nodes load balance via anycast
Network Virtualization: LNV
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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: http://bit.ly/1OTmxKw
cumulusnetworks.com
L3
L2
ECMP

7. Network Virtualization: Head-end Replication
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L3
L2
ECMP
cumulusnetworks.com
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: http://bit.ly/1MEUUPD

8. Network Virtualization: VXLAN Active-Active Mode
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L3
L2
ECMP
cumulusnetworks.com
More info: http://bit.ly/1SJ0unF
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 1.1.1.1/32
clagd-vxlan-anycast-ip 36.0.0.11
auto lo
iface lo
address 2.2.2.2/32
clagd-vxlan-anycast-ip 36.0.0.11
Leaf 1
Leaf 2

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: http://bit.ly/1Oid2RZ
cumulusnetworks.com
cumulus@leaf1$ ip route show table mgmt
default via 192.168.0.1 dev eth0
Default Route
Default Route

10. IPv6 Resilient Hashing
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More info: http://bit.ly/1Z8xwBF
cumulusnetworks.com
• 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. 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: http://bit.ly/1PDgjOR
cumulusnetworks.com

12. RMP Enhancements
 RMP 2.5.5 is the default image for new RMP orders
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https://cumulusnetworks.com/cumulus-rmp/overview/
cumulusnetworks.com

13. Nutanix Monitoring Integration
December 14, 2015 13cumulusnetworks.com
• 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. 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
https://github.com/CumulusNetworks/netshow-core
More info: http://bit.ly/1TLQYke
cumulus@leaf1$ netshow interface
Name Speed Mtu Mode Summary
-- ------ ------- ----- -------- --------------------------
UP lo N/A 16436 Loopback IP: 127.0.0.1/8, ::1/128
UP eth0 1G 1500 Mgmt IP: 192.168.0.11/24 (DHCP)
netshow tool is installed by default on Cumulus Linux 2.5.5

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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