Software Upgrade And Downgrade Impact; Show Install All Impact Kickstart - Cisco Nexus 5000 Series Operation Manual

Software Upgrade and Downgrade Impact

S e n d d o c u m e n t a t i o n c o m m e n t s t o n 5 k d o c f e e d b a c k @ c i s c o . c o m
The forwarding process is as follows:
1.
2.
3.
Note
In Cisco NX-OS Release 5.0(3)N1(1b), the no ip igmp snooping mrouter vpc-peer-link command
cannot be applied with a FEX dual-homed topology.
4.
5.
Software Upgrade and Downgrade Impact
In Cisco NX-OS Release 5.0(3)N1(1b), the Cisco Nexus 5500 Platform switch does not support ISSUs
when Layer 3 modules are installed and Layer 3 features are enabled. Use the install all command and
the show install all impact command to determine the impact of the software upgrade and to indicate
whether the software upgrade with Layer 3 features enabled will be disruptive and would require a
switch and FEX reload.

show install all impact kickstart

This example shows the output of the show install all command:
Layer 3-N5548-2# show install all impact kickstart
n5000-uk9-kickstart.5.0.3.N1.0.271.bin.upg system n5000-uk9.5.0.3.N1.0.271.bin.upg
Verifying image bootflash:/n5000-uk9-kickstart.5.0.3.N1.0.271.bin.upg for boot variable
"kickstart".
[####################] 100% -- SUCCESS
Verifying image bootflash:/n5000-uk9.5.0.3.N1.0.271.bin.upg for boot variable "system".
[####################] 100% -- SUCCESS
Verifying image type.
[###########
[####################] 100% -- SUCCESS
Extracting "system" version from image bootflash:/n5000-uk9.5.0.3.N1.0.271.bin.upg.
[####################] 100% -- SUCCESS
Cisco Nexus 5000 Series NX-OS Interfaces Operations Guide, Release 5.0(3)N2(1)
2-14
IGMP joins from the hosts are synchronized between the two vPC peer switches. N5k-2 is elected
as the PIM DR for VLAN 10. Multicast traffic is sent over to N5k-1.
The routing engine of N5k-1 performs an mroute lookup and replicates packets to VLAN 11 and
VLAN 12. The data packets for VLAN 11 and VLAN 12 are sent to the FEX which in turn sends
packets to the two receivers;
By default, the replicated packets are sent to the vPC peer link for the source VLAN as well as each
receiver VLAN (VLAN 10, VLAN 11, and VLAN 12) in this example. When you use the no ip igmp
snooping mrouter vpc-peer-link command, the multicast packets are not sent to the peer link for
VLAN 10, VLAN 11, and VLAN 12 because there are no orphan ports. One copy of the packets is
sent to the peer link with the reserved VLAN 3000 which was configured using the vpc bind-vrf
default vlan 3000 command.
For the multicast traffic received from the peer link, if the VLAN ID is the reserved VLAN ID 3000,
the N5k-2 route engine performs a Layer 3 lookup and replicates packets to VLAN 13 (a non-vPC
VLAN) and receivers behind Layer 3 interfaces.
For the multicast packets received over the peer link, VLAN 10, VLAN 11, and VLAN 12 are
dropped by N5k-2 to prevent duplicated packets being sent to the vPC hosts. If any orphan ports are
in VLAN 10, VLAN 11, and VLAN 12, the packets are bridged to the orphan ports.
] 50%
Chapter 2 Cisco Nexus 5500 Platform Layer 3 and vPC Operations