Questions tagged [cisco-nexus]
For questions about the Cisco network product line, called Nexus. For instance, Cisco Nexus 3000, 4000, 5000, 6000, 7000 and 9000.
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Cisco nexus 9336-FX2 ETHPORT-5-IF_DOWN_LINK_FAILURE
I am seeing following error on 100G interface. (SFP bought from fs.com)
nxos version 9.3.10
2023 Oct 11 00:41:12 spine-1 %ETHPORT-5-IF_DOWN_LINK_FAILURE: Interface Ethernet1/4 is down (Link failure)
...
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Why are 10.3(99w)F and 10.3(99x)F NX-OS named like that?
According to https://www.cisco.com/c/en/us/products/collateral/ios-nx-os-software/nx-os-software/guide_c07-658595.html#TypesofCiscoNXOSSoftwarereleases the part in brackets - "99w" and "...
- 113
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313
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Cisco Nexus vPC Portchannel issues
I'm currently facing a network issue between Cisco Nexus 93108 (9.3.11) on an LACP port-channel configuration.
The replica below help us to reproduce the issue we had (using 4x Nexus 9000v qcow2 image ...
- 101
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1
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715
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Cisco NX-OS Factory Reset
An easy question actually. How do I do a Factory Reset on NX-OS? That means, how do I completely and permanently wipe all the configuration I've made without deleting the operating system image? There ...
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62
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cisco nexus qos vs control-plane policy
I have a pair of nexus 3064 and I want to secure their control plane but nexus series do not allow us to assign custom policy or class map to control-plane command thus I was thinking to use system ...
- 577
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2
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570
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Breakout from 400Gbps to n*25Gbps
My servers are currently have 25Gbps NIC, but switch ( Cisco Nexus 9300 series) has only 400Gbps.
I would like to be able to break out the 400Gbps connection into four 25Gbps connections. Is this ...
- 115
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1k
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SSH Config on Nexus Switch
Having trouble configuring SSH on 2 Fiber Channel Switches (NX-OS). Any Cisco experts here that can help?
I am pretty new with Cisco and having trouble looking for documentation on SSH config for ...
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3
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126
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dynamic mac address added all hosts through the Do1Q tunnel
we have a nexus switch, we configure two customer ports in different switches with (mode Dot1Q tunnel)
as all traffic must have two VLAN tags, an inner tag, and an outer tag,
in our network, we ...
- 331
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657
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Nexus 7706 - switchport trunk allowed vlan not working - all VLANs are being allowed
I noticed that my two Nexus 7706 do not limit the trunk VLANs to what switchport trunk allowed vlan is set to.
Sample configuration:
interface Ethernet1/15
switchport
switchport mode trunk
...
- 226
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1
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33
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Cisco N3k ipv4 table size
I read n3k-c3064pq datasheet and it seems it supports 16k ipv4, i want to know when i add one route for example "ip route 192.168.0.0/16 172.16.1.1" then it will consume 1 of 16k ipv4 table ...
- 577
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58
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Is it risky to change hardcoded STP mLAG port cost on Cisco Nexus LACP port
When two Cisco Nexus are connected in VPC, the stp cost is hardcoded to 200 for the mLAG LACP ports.
I would like to manually change the cost on my devices because my 2G and 200G links have the same ...
- 123
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1
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7k
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Port suspended (No LACP PDUs) nx 9k switch -> C220 m5 ucs
We are setting up 2 nx 9k switches with port channel (LACP) enabled so we can have multiple links for redundancy. The two links in questions is eth1/3 on both switches going to UCS MLOM ports.
We are ...
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51
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Cisco 9396PX sFlow shows one direction traffic
Interface VLAN on Nexus 9396PX doesn't show Output traffic and also sFlow for outbound traffic. We have change TCAM to show sFlow but it still doesn't show Outbound traffic and shows only Inbound ...
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What is "oc_usd" Process on Cisco Nexus 7k and how to solve
We have high CPU load on Cisco nexus 7K. The reason is "oc_usd" process.
Anyone knows anything about the process and how can we solve the issue?
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How can I upgrade Cisco Nexus switch if not enough space for new image?
I have Nexus 92348GC-X units with 9.3.7 image version and I need to upgrade them, BUT not enoght space on this devices for new image upload (nxos 9.3.9)
Moreover, I can't delete old image after I ...
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MACsec encryption feature on Cisco NX-OSv 9000 Virtual Software?
https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/sw/7-x/nx-osv/configuration/guide/b_NX-OSv_9000/b_NX-OSv_chapter_01.html
The above link only stated some examples of features which ...
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How can I exactly find out what outgoing interface is using?
I need to identify what outgoing interface is using for some destination address.
show ip route tells me several BGP routes to this destination, how can I exactly find out what switch's interface will ...
- 255
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1
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249
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Switch Port channel down but firewall did not log the port down event
Can some one help me here if I am missing anything to check.
Issue:
Our Palo Firewall got a vwire configured with interfaces eth1/5 & eth1/6.
eth1/5 is directly connected to eth1/2 of cisco switch ...
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553
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Nexus Management VRF on same VLAN as LAN switches
1
Hi All.
I searched this question but I'm not finding anything relevant, or I'm not understanding the results properly. I have all my L2 switches remote management access, SSH/SFTP, configured on a ...
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replace power in nexus 7004 chassis
I have the following chassis :
1x N7K-C7004 with full powers and fan
1x N7K-F248XP-25E
2x N7K-SUP2
i want to know is there any difference in energy consumption if i use N7K-AC-6.0KW instead of N7K-AC-...
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VPC two types of nexus 7700
Can we VPC two types of nexus 7700 with each other? I mean , we want to VPC one Nexus 7710 with Nexus 7718.
Does it possible ?
Thanks,
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2
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767
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Can anyone please explain L3 SVI configuration ,What is SVI and Where do we use it?
I am learning about switching and came across SVI in vlans ,I Googled and watched couple videos and got really confusing Firsly where do we use Svi? and why do we use it,How to configure svi and what ...
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Fabric Extender for Peer-Link on vPC domain (two Nexus 5000 switches)
I have two Nexus 5000 series switches. My question lies with the Peer Link. My intentions are to use e1/31 and e1/32 on both switches as the peer link. Here are the exact SFPs that I am using for ...
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1
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160
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Cisco N3K-C3064 RACL question
I have a cisco nexus n3k-c3064pq-10gx and i want to have an acl and add 270x line (they will drop my interface vlan IP address because they are public IP), I want to know can I have this acl with 270x ...
- 577
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81
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Cisco QSFP port to SAN(16G , 32G) Connection
Cisco has a Nexus 9000 model which supports FC. But all ports are QSFP, how can we connect FC to QSFP?
Model:
Cisco Nexus 9336C-FX2-E Switch
Port:
36 x 40/100-Gbps QSFP28 ports
Descriptions:
The Cisco ...
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1
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426
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Best practice for configuring sampler rate on Nexus 7000 for Netflow
Is there a best practice for configuring the sampler rate for interfaces that will be sending netflow data. I have tested on our Nexus 7000 with the mode 1 out-of 1000 on interfaces that are seeing ...
- 383
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394
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vPC between Cisco nexus 9236C and 9336C
I have a Nexus N9K-C9236C and I would like to add an other one to have redundancy with vPC fonctionnality (like describe here).
The point is my suppliers don't sell this model anymore because it has ...
- 113
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1k
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BGP over VPC on NEXUS
here is my network topology:
i have a customer which is connected to my top of rack switch and my top of rack switch has 2x 10g LACP towards my both Cisco Nexus 3k and both of my Nexus 3k has VPC ...
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636
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TCAM carving question for Cisco Nexus 9396PX
TCAM carving question for Cisco Nexus 9396PX
I have Cisco Nexus 9396PX and configure for IPv4 with IPv4 RACL on SVI to block some basic traffic. Now i have configured IPv6 and trying to configure ...
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216
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What prevents a device from receiving its own multicast stream, and can it be turned off?
I know that it is normally not possible for a device to receive its own multicast stream on the same network interface where it transmitted said stream. I also understand why this is sensible, and ...
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143
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question about bypassing access switch
we have 2x Juniper QFX as access switch (In Virtual chassis mode) and we have 16x Rack, we have 1x 10Gbps sfp+ uplink to each juniper so each rack has 2x 10g towards 2x Juniper qfx access switch and ...
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BGP running on VLAN interface or loopback0?
The switches mention below are all Cisco.
I got sw01 and sw02 running BGP peering with multiple service provider for our internal infrastructure, between sw01 and sw02 have a port-channel group 100.
...
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1k
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EVPN VxLAN arp suppression TCAM carving
Deploying Clos design network using leaf Cisco Nexus 9396PX and when trying to configure arp-suppression using tcam carving getting this error
Free up tcam slice from VACL (default vacl tcam is 512)
# ...
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5
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333
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Cisco N9K - Down an interface in response to another interface going down?
I currently have my transit providers plugged directly into my router. I really like this arrangement because when the ISP goes down this typically downs the interfaces which results in BGP peering ...
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2
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669
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Cisco n3k-3064PQ-10gx TCAM problem
i have a n3k-3064pq-10gx and i want to have 1x pbr to change some 400x SVI next-hop , when i tried to apply the pbr to a l3 interface or SVI it says "% Could not apply PBR route-map - Specified ...
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1k
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Break sequence with Cisco devices
I am not able to send a break sequence from my HP pro book laptop to Cisco Nexus 9000 series switch over a usb adapter and Cisco console cable.
I tried every possible button combination.
I do not ...
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3
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1k
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Difference between N3K and N5K
I have 4-5m PPS and ~12Gb bps and around 650 interface vlan and each vlan has 3-4x prefix such as /29 or /28 and i have 6-7 bgp session with no full table and around 2000 IP routes with around 3000 ...
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questions on nexus 3064
In most of times i have worked with Juniper switches but in some cases i should use some Nexus 3064PX series(48x sfp+) so i have some questions :
as i remembered some switches such as 3750 has some ...
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2
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311
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how to move configuration from one Nexus interface to another?
I am doing some cleanup on a Nexus switch I have (3048) and was wondering if there was an easy way to copy or move a configuration from one interface to another? When I move an existing connection to ...
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151
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Cisco CML 2.0 strange ASA trunking issue
I am seeing very strange issue and now i am losing my mind so thought ask you folk. I have following two components connected point to point on Cisco CML 2.0
[nxos-9000v]--------------------[ASAv]
...
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1
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NX-OS 9.3: ECMP polarization and "ip load-sharing ... rotate"
This is a "why and how exactly does this work" question. The given problem is already solved.
QUESTION:
I'm interested to understand what "rotate" in ip load-sharing address source-...
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154
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Data Center migration
We have two data centers in different locations and we want to transfer DC2 (secondary Data Center) from location Y to location X where X is DC1 (Primary) location. The connection between both data ...
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796
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Use ECMP to distribute traffic between two paths, one learned by eBGP and one learned by iBGP on a Cisco NX-OS switch
I maintain two cross-connected switches, R1 and R2, which both have a link to an external switch, R3. R1 and R2 both use eBGP to receive routes to various subnets behind R3. Additionally, R1 and R2 ...
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466
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Port Channel issue on Cisco gear
I have a lab where I'm connecting a Cisco CSR1000V and a Nexus 9000 switch. These devices are connected back to back. Relevant configuration is:
Router:
interface Port-channel1
mtu 9216
!
interface ...
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1k
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Cisco Nexus N9K-C92160YC-X kernel panicking at bootup and stuck in endless powercycle
I believe I have a bad Cisco Nexus N9K-C92160YC-X.
I received this switch on loan from a customer with a blank configuration. I've recently learned that its warranty is expired and it's not ...
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98
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VETH ports not working for cisco vIOS L2 devices (vios-l2 and nx-osv) using kvm/qmeu for virtualisation
Ok, so I've been toying with veth links for my Cisco routers and they have been working fine. However when you throw in a virtual switch like the Cisco nx-osv or vios l2 image, using veth interfaces ...
- 11
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1
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3k
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Cisco Nexus RADIUS authentication privilege issue
I'm trying to set up RADIUS authentication between a Nexus C93180YC and a Microsoft NPS Server.
The RADIUS server is reachable and I'm able to log in and get permission granted, but the network role ...
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2
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5k
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Cisco nexus CRC error on interface
I have dual stack vPC setup between 4 cisco nexus switch as per above design. I have noticed recently that getting CRC error on cisco 3064 all 4 interface connected to N9K, and during peak traffic ...
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1
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106
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Filter Packet PPPoE Discovery
i have a sw nexus
i have a router BGN with vlan 50 is going to sw then mode access to Client 1 and Client 2
BNG ==== SW1 == PORT1 =Client 1 (Mode access vlan 50)
PORT2 =Client 2 (...
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387
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can't find notify syslog in cisco sw nexus 3000
in cisco IOS i was used "Configuration Change Notification and Logging"
but in cisco sw-nexuis i can't fine the commend
SW-nex3000(config)# archive
SW-nex3000(config-archive)# log config
...
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