Hi Neale,
Thanks a lot for the help.
Thanks & Regards,
Sreejith
On Fri, 26 Aug, 2022, 4:34 AM Neale Ranns, <ne...@graphiant.com> wrote:
>
>
>
>
> *From: *vpp-dev@lists.fd.io <vpp-dev@lists.fd.io> on behalf of sreejith n
> via lists.fd.io <sreejithsurendrannair2=gmail....@lists.fd.io>
> *Date: *Thursday, 25 August 2022 at 13:10
> *To: *vpp-dev@lists.fd.io <vpp-dev@lists.fd.io>
> *Subject: *[vpp-dev] Query regarding neos mpls fib entry for tunnel
> interface
>
> Hi All,
>
>
>
> I have a query regarding neos mpls fib entry for tunnel interface. I have
> observed when we create mpls fib entry with neos bit set for tunnel label
> it always sets forwarding as drop ("dpo-drop mpls"). For the eos bit the
> issue is not seen the forwarding is set correctly.
>
>
>
> Is this expected to have neos mpls fib entry created as drop for mpls
> tunnel interface. Is this due to any reason. I am checking on a use case in
> which I have to set the tunnel label with both neos and eos fib bit entry
> for the lookup and forwarding .
>
>
>
> Logs:
>
>
>
> CLI:
>
> "mpls local-label add 51999 via l2-input-on mpls-tunnel0"
>
>
>
> You are adding the local-label entry to point to l2-input, that is, after
> popping the label consider what remains to be an ethernet frame and pretend
> that it arrived on mpls-tunnel0. That works when the label popped is
> end-of-stack, but not when it’s not end-of-stack. Hence the neos entry is a
> drop.
>
>
>
> /neale
>
>
>
>
>
> MPLS FIB:
>
> *51999:neos/21 fib:0 index:35 locks:2*
>
> CLI refs:1 entry-flags:attached, src-flags:added,contributing,active,
>
> path-list:[30] locks:4 flags:shared, uPRF-list:27 len:0 itfs:[]
>
> path:[34] pl-index:30 ethernet weight=1 pref=0 intf-rx:
> oper-flags:resolved, cfg-flags:interface-rx,
>
> [@0]: mpls-tunnel0-rx-dpo: ethernet
>
>
>
> *forwarding: mpls-neos-chain >>>> NEOS*
>
> * [@0]: dpo-load-balance: [proto:mpls index:40 buckets:1 uRPF:27
> to:[0:0]]*
>
> * [0] [@0]: dpo-drop mpls** >>>> DROP*
>
> *51999:eos/21** fib:0 index:24 locks:2*
>
> API refs:1 entry-flags:attached, src-flags:added,contributing,active,
>
> path-list:[30] locks:4 flags:shared, uPRF-list:27 len:0 itfs:[]
>
> path:[34] pl-index:30 ethernet weight=1 pref=0 intf-rx:
> oper-flags:resolved, cfg-flags:interface-rx,
>
> [@0]: mpls-tunnel0-rx-dpo: ethernet
>
>
>
> * forwarding: mpls-eos-chain >>>>>> EOS*
>
> *[@0]: dpo-load-balance: [proto:mpls index:26 buckets:1 uRPF:27
> to:[34:1700]]*
>
> * [0] [@6]: mpls-tunnel0-rx-dpo: ethernet >>>> VALID*
>
>
>
> Thanks & Regards,
>
> Sreejith
>
>
>
>
>
>
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