7 votes

1 x 40G QSFP to 4 x 10G SFP+ Can these 4 x 10G breakouts go to different hosts?

A 1x40G QSFP port can be fanned-out to 4x10G SFP+ ports. You need to configure that 40G port as 4 Tengig ports in the switch. The break out cables on the other end can go to different hosts.
Venkat Sankaran's user avatar
6 votes

Cisco Nexus 6k mac move detection not working

Physically moving a device from port to port will not trigger a mac-move event. When you disconnect from port A, the link drops and all state is discarded -- including any known MACs on that port. ...
Ricky's user avatar
  • 32.2k
4 votes
Accepted

VLAN does not exist in NXOS

You are not really creating the VLANs; you are creating the SVIs for the VLANs. If your switch isn't getting the VLAN information from elsewhere, then you need to create the VLANs. From the global ...
Ron Maupin's user avatar
  • 99.6k
4 votes
Accepted

Cisco 3172 asks for LAN_ENTERPRISE_SERVICES_PKG license to enable OSPF and PIM when they are LAN_BASE_SERVICES_PKG license features

This is due to bug: CSCuz14971 N3000 incorrectly requires Enterprise license for PIM and OSPFv2 This is fixed in 7.0(3)I4(2) 7.0(3)I2(4) 7.0(3)F1(1) and later. Note that this is purely ...
hertitu's user avatar
  • 2,648
4 votes
Accepted

Cisco 3064 switch upgrade from 6.0.x to 7.0.x issue

Soution: For testing i have download 7.0(3)I4(4) nx-os file but same issue, no luck :( But then i decided just Install instead of verification and it works! switch# install all nxos bootflash:nxos....
Satish's user avatar
  • 4,379
4 votes

1 x 40G QSFP to 4 x 10G SFP+ Can these 4 x 10G breakouts go to different hosts?

The Cisco 5696Q supports this according to the Cisco datasheet. There are instructions on how to configure it. These 4 ports will behave like individual ports but be aware that they are the same QSFP ...
Sebastian Wiesinger's user avatar
4 votes

Cisco ACL Entries

That's correct -- the ACL doesn't consume additional TCAM space as you apply it to more interfaces.
Jeff Wheeler's user avatar
  • 5,469
3 votes
Accepted

nxos ansible playbook to configure interface

Finally end up using following module, not pretty but doing what it need to do - name: sample playbook hosts: n3k1 tasks: - name: globle configuration nxos_config: lines: ...
Satish's user avatar
  • 4,379
3 votes

Nexus 9396px FAN speed issue

Is the second power supplied un-powered? The lack of airflow from the second PS is likely causing the other fans to spin up to compensate. This is likely a change in logic between the old and new ...
rnxrx's user avatar
  • 6,114
3 votes

Communication between VDCs on Cisco Nexus 7000 via virtual interface

There is no way to do what you want to do. VDCs virtualize control plane and data plane in protected memory so that each is an independent virtual device, just like independent physical devices. You ...
Ron Maupin's user avatar
  • 99.6k
2 votes

Cisco Nexus 5k EIGRP Configuration

I could be wrong here, but it looks to me like both switches have the same subnets defined. If I'm DUAL I'm going to remove a route I learn from you if I already have that subnet locally connected.
BlackMagix's user avatar
2 votes
Accepted

TACACS Implentation server key error

To answer your question: Yes. ;) Problem solution is actually easy, as it turns out - I will be quoting what I found out: The NX-OS password scheme is a normal rotation cipher. This is the sequence: ...
xpac's user avatar
  • 440
2 votes
Accepted

QoS (802.1p) for iSCSI Traffic on Cisco Nexus 3048

If the clasification isn't available on the switch model, then you need to look at something like ACL-based QoS classification (Layers 2, 3, and 4) so that you can mark what traffic, by IP address ...
SleepyMan's user avatar
  • 2,016
2 votes
Accepted

understand "switch-profile" for Nexus 5k switches

Setting up the configuration synchronization mode (conf sync) involves creating a switch profile (switch-profile). Cisco has a lot of documents regarding this, e.g. Chapter: Configuring Switch ...
Ron Maupin's user avatar
  • 99.6k
2 votes

Nexus OS authenticate via ssh key

In NX OS version 6 the following works: username <your username> sshkey ssh-rsa <your rsa key> You must of course set the access level with, for example for full access username <...
JFL's user avatar
  • 19.6k
2 votes

How long of an outage for ISSU Nexus Upgrade?

The best tip I can give for anything involving ISSU on 7K's is to read- and re-read- the release notes. There are very specific versions that are supported as origin/destination and there are also ...
rnxrx's user avatar
  • 6,114
2 votes
Accepted

Differences between SNMP on NX-OS and IOS

The ACL does work but is handled in a second line - so: snmp-server user [user] auth ... (as above) and then snmp user [user] {use-ipv4acl | use-ipv6acl} [aclname] This syntax can also be used ...
rnxrx's user avatar
  • 6,114
2 votes
Accepted

Cannot enable Flow Control on Cisco Nexus 3048

As the error indicates, link-level flowcontrol (LLFC) is not supported on the Nexus 3000 and 3100 series. It is supported on the Nexus 3500 series and Nexus 9000. As an alternative, you could ...
hertitu's user avatar
  • 2,648
2 votes
Accepted

Leak default route to multiple VRFs while keeping VRFs isolated from each other

Turns out, it is possible :) At first we had some difficulty getting redistribution of the default route from OSPF to the BGP instance used for route leaking working. So I ended up 'just' doing a ...
Marlies's user avatar
  • 131
2 votes

NXOS DHCP Relay - overwriting Option 54 (Server Identifier) differently in DHCPDISCOVER vs. DHCPREQUEST?

Just wanted to share some info on a similar issue our customer is facing. They have migrated from VSS to NXOS VXLAN fabric and the PXE boot that uses BOOTP from the SCCM server stopped working for ...
Alexei Monastyrnyi's user avatar
2 votes

N5K-5548UP-AF CoPP issue

Segregating user traffic from management plane interfaces and traffic is also a good idea. Where available, make use of the dedicated management ports, or make sure your switches don't have their ...
Marc 'netztier' Luethi's user avatar
2 votes

Nexus vPC quick guide

I'd suggest adding ip arp synchronize under the VPC configuration. It would also be smart to add an auto-recovery delay (both standard and reload) to account for letting a returning switch to ...
rnxrx's user avatar
  • 6,114
2 votes
Accepted

nexus access lists performance

ACLs are generally implemented using a TCAM device (ternary content-addressable memory) where all entries are checked simultaneously in real time and at wire speed. On some devices, activating an ACL ...
Zac67's user avatar
  • 84.4k
1 vote

NXOS DHCP Relay - overwriting Option 54 (Server Identifier) differently in DHCPDISCOVER vs. DHCPREQUEST?

Partial Answer to "Question B" It's perfectly normal to have the DHCP Server's own IP address in the "Next Server" field in a DHCPOFFER, and this is entirely unrelated to the use of the (same) server ...
Marc 'netztier' Luethi's user avatar
1 vote
Accepted

Cisco Nexus 6k mac move detection not working

The main problem is that mac move detection is workin a bit differently than on old IOS releases. IOS every time drops log message when mac changes link where is nexus not. As the result mac move ...
Tomato's user avatar
  • 123
1 vote

Leak default route to multiple VRFs while keeping VRFs isolated from each other

You will have to keep the VRFs separate until the traffic reaches a firewall or similar device. That will probably mean separate NAT devices for each VRF.
Ron Trunk's user avatar
  • 67.5k
1 vote
Accepted

Nexus 9396px FAN speed issue

I have asked same question in Cisco community and got answer from one of Cisco employee.
Satish's user avatar
  • 4,379
1 vote
Accepted

How long of an outage for ISSU Nexus Upgrade?

I found the issue. The interfaces of the 7K we were upgrading didn't have the 'no ip redirects' command on. This caused a drop in BFD between the neighboring router we were testing from and also ...
stets's user avatar
  • 1,010

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