BGP not coming up Nexus 9000

[TRACY HARTMANN]

This Nexus seems to have different commands and the BGP is not coming up.   I don't show any neighbors or even like it is trying to come up.

Below is some information about the Nexus and the config

 Software
BIOS: version 08.32
NXOS: version 7.0(3)I4(7)
BIOS compile time: 10/18/2016
NXOS image file is: bootflash:///nxos.7.0.3.I4.7.bin
NXOS compile time: 6/28/2017 14:00:00 [06/29/2017 05:53:29]

cisco Nexus9000 C9504 (4 Slot) Chassis ("Supervisor Module")
Intel(R) Xeon(R) CPU E5-2403 v2 @ 1.80GHz with 16401184 kB of memory.
Processor Board ID FOC21413L60

feature bgp  (is this the only one I need on?  I was only using statics before)

router bgp 64649
log-neighbor-changes
address-family ipv4 unicast

Network 2.2.2.0 /24

neighbor 10.13.252.26
remote-as 64576
neighbor 10.13.252.27
remote-as 64577

Do I need a local router ID defined?

show ip bgp summary

BGP summary information for VRF default, address family IPv4 Unicast

Seems like I am missing something

[marce1000]

 - Review this document https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/sw/6-x/unicast/configuration/guide/l3_cli_nxos/l3_bgp.html , check if the licensing requirements are met (too).

 M.

[balaji.bandi]

You need to provide more information here. is the nexus in vPC ? Do you have VRF ? Do you have neighbor IP reachability?

show bgp all

[Georg Pauwen]

Hello,

feature bgp

is the only one you need. Try and add the neighbors under the main BGP process rather than the address family:

router bgp 64649
log-neighbor-changes
--> neighbor 10.13.252.26 remote-as 64576
--> neighbor 10.13.252.27 remote-as 64577
address-family ipv4 unicast

[MHM Cisco World]

if the neighbor is direct connect then OK if not please share the topology with some more info

[Harold Ritter · Accepted solution]

Hi @TRACY HARTMANN ,

With NXOS, you need to enable the

address-family ipv4 unicast

under each neighbor.

router bgp 64649

neighbor 10.13.252.26

remote-as 64576

address-family ipv4 unicast

neighbor 10.13.252.27

remote-as 64577

address-family IPv4 unicast

Regards,

[TRACY HARTMANN · Accepted solution]

This fixed it thank you for your help.

[MHM Cisco World]

For NKOS the address family can config 

1- under router

2- under neighbor 

He already config it under router? Or this is bug?

[Harold Ritter]

Hi @MHM Cisco World 

This is not a bug. NXOS BGP configuration structure is closer to IOS-XR than IOS. 

1- The

address-family ipv4 unicast

section under router bgp is used to configure things that will apply to this address family as a whole, such as maximum-path, network statements, etc.

2- The

address-family ipv4 unicast

under the neighbor is to first and foremost activate the address family on the neighbor

(IOS uses neighbor x.x.x.x activate under address-family ipv4 uni) 

and secondly it is used to configure parameters related to the specific address family for this neighbor, such as

route-map, prefix-list, default-originate

etc.

Regards, 

[HossamEddineihab]

I had same issue however I need to activated under address-family l2vpn evpn  , same BGP is not able to Up

[HossamEddineihab]

Resolved Finally , thank you so much @Harold Ritter 

[Harold Ritter]

You are very welcome @HossamEddineihab and thanks for the feedback