BGP on VRF - Unable to allocate label: 'MPLS_LSD' detected

[ciscokid9]

Hi 

We created 2 Full BGP , each of different VRF, and following warning out.   We had alredy set :

mpls label range table 0 16000 1048575

But 2 Full BGP for internet routing  may not sufficient  for 1Mil route.  We using typhoon card . 

: bgp[1067]: %ROUTING-BGP-3-ERR_ALM_ONE_LABEL : [7] : Unable to allocate label: 'MPLS_LSD' detected the 'resource not available' condition 'Code(0)': No space left on device

I guess MPLS is not necessary here,  why default is tagging the route to MPLS ?  How can we avoid this. 

[nkarpysh · Accepted solution]

Hello,

You may want to switch to per-vrf label assingment. Otherwise MPLS will try to assign local label per each prefix and you hit limitation. Please find details here:

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/mp_l3_vpns/configuration/15-mt/mp-l3-vpns-15-mt-book/mp-vpn-vrf-label.html

[ciscokid9]

Niko suggestion works. Just need to change to IOX-XR config, mpls labeling in  router BGP, VRF and ipv4 unicast. 

[nkarpysh]

Cool, thx for update!

[amar_5664]

I am hitting similar situation running IOS-XR, dont see this command feature available. Do we need to enable particular feature PIE package? 

[Harold Ritter]

Hi @amar_5664 ,

You need something similar to this in XR to change the label mode to per vrf:

router bgp <your asn>
vrf <you vrf name>
address-family ipv4 unicast
label mode per-vrf
!
!
!

Regards,

[amar_5664]

Thanks Harold, spot on that resolved our challenge.