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2. |
Verify underlay transport (LDP label distribution and neighbor status).
Confirm that LDP sessions are established with all peers, showing state "Oper".
Example:
Router-PE1# show mpls ldp neighbor
Peer LDP Identifier: 192.0.2.11:0
TCP connection: 192.0.2.11:47619 - 192.0.2.10:646
Graceful Restart: No
Session Holdtime: 180 sec
State: Oper; Msgs sent/rcvd: 40395/35976; Downstream-Unsolicited
Up time: 2w2d
LDP Discovery Sources:
IPv4: (1)
TenGigE0/0/0/2
IPv6: (0)
Addresses bound to this peer:
IPv4: (6)
10.64.98.32 192.0.2.13 192.0.2.14 192.0.2.15
192.0.2.16 192.0.2.19
IPv6: (0)
Example:
Router-PE1# show mpls forwarding
Local Outgoing Prefix Outgoing Next Hop Bytes
Label Label or ID Interface Switched
------ ----------- ------------------ ------------ --------------- ------------
24036 Pop 192.0.2.11/32 Hu0/0/0/2 192.0.2.12 293294
24037 24165 192.0.2.20/32 Hu0/0/0/2 192.0.2.12 500
24039 24167 192.0.2.17/32 Hu0/0/0/2 192.0.2.12 17872433
24167 192.0.2.17/32 Hu0/0/0/2.1 192.0.2.21 6345
24041 Aggregate vrf1601: Per-VRF Aggr[V] \
vrf1601 0
Example:
Router-PE1# show mpls forwarding labels 24001 hardware egress
Local Outgoing Prefix Outgoing Next Hop Bytes
Label Label or ID Interface Switched
------ ----------- ------------------ ------------ --------------- ------------
24039 24167 192.0.2.17/32 Hu0/0/0/2 192.0.2.12 N/A
24167 192.0.2.17/32 Hu0/0/0/2.1 192.0.2.21 N/A
Show-data Print at RPLC
LEAF - HAL pd context :
sub-type : MPLS, ecd_marked:0, has_collapsed_ldi:0
collapse_bwalk_required:0, ecdv2_marked:0
Leaf H/W Result:
Leaf H/W Result on NP:0
Label SwitchAction EgressIf Programmed
24039 0 0x 200185 Programmed
nrLDI eng ctx:
flags: 0x101, proto: 2, npaths: 0, nbuckets: 1
ldi_tbl_idx: 0xc37e40, ecd_ref_cft: 0
pbts_ldi_tbl_idx: 0x0, fastnrldi:0x0
NR-LDI H/W Result for path 0 [index: 0xc37e40 (BE), common to all NPs]:
ECMP Sw Idx: 12811840 HW Idx: 200185 Path Idx: 0
NR-LDI H/W Result for path 1 [index: 0xc37e41 (BE), common to all NPs]:
ECMP Sw Idx: 12811841 HW Idx: 200185 Path Idx: 1
SHLDI eng ctx:
flags: 0x0, shldi_tbl_idx: 0, num_entries:0
SHLDI HW data for path 0 [index: 0 (BE)] (common to all NPs):
Unable to get HW NRLDI Element rc: 1165765120NRLDI Idx: 0
SHLDI HW data for path 1 [index: 0x1 (BE)] (common to all NPs):
Unable to get HW NRLDI Element rc: 1165765120NRLDI Idx: 1
TX H/W Result for NP:0 (index: 0x187a0 (BE)):
Next Hop Data
Next Hop Valid: YES
Next Hop Index: 100256
Egress Next Hop IF: 100047
Hw Next Hop Intf: 606
HW Port: 0
Next Hop Flags: COMPLETE
Next Hop MAC: e4aa.5d9a.5f2e
NHINDEX H/W Result for NP:0 (index: 0 (BE)):
NhIndex is NOT required on this platform
NHINDEX STATS: pkts 0, bytes 0 (no stats)
RX H/W Result on NP:0 [Adj ptr:0x40 (BE)]:
Rx-Adj is NOT required on this platform
TX H/W Result for NP:0 (index: 0x189a8 (BE)):
Next Hop Data
Next Hop Valid: YES
Next Hop Index: 100776
Egress Next Hop IF: 100208
Hw Next Hop Intf: 607
HW Port: 0
Next Hop Flags: COMPLETE
Next Hop MAC: e4aa.5d9a.5f2d
NHINDEX H/W Result for NP:0 (index: 0 (BE)):
NhIndex is NOT required on this platform
NHINDEX STATS: pkts 0, bytes 0 (no stats)
RX H/W Result on NP:0 [Adj ptr:0x40 (BE)]:
Rx-Adj is NOT required on this platform
Verify if the LDP neighbor connection is established with the respective neighbor:
Verify if the label update is received by the FIB:
Verify if label is updated in the hardware:
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3. |
Verify overlay (L3VPN route and label state).
Confirm that BGP neighbors are established, routes are advertised and learned, and VPN routes appear as expected.
Example:
Router-PE1# show bgp summary
BGP router identifier 192.0.2.10, local AS number 2001
BGP generic scan interval 60 secs
Non-stop routing is enabled
BGP table state: Active
Table ID: 0xe0000000 RD version: 18003
BGP main routing table version 18003
BGP NSR Initial initsync version 3 (Reached)
BGP NSR/ISSU Sync-Group versions 0/0
BGP scan interval 60 secs
BGP is operating in STANDALONE mode.
Process RcvTblVer bRIB/RIB LabelVer ImportVer SendTblVer StandbyVer
Speaker 18003 18003 18003 18003 18003 0
Neighbor Spk AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down St/PfxRcd
192.0.2.22 0 2001 19173 7671 18003 0 0 1d07h 4000
192.0.2.23 0 7001 4615 7773 18003 0 0 09:26:21 125
Example:
Router-PE1# show bgp vpnv4 unicast
BGP router identifier 192.0.2.10, local AS number 2001
BGP generic scan interval 60 secs
Non-stop routing is enabled
BGP table state: Active
Table ID: 0x0 RD version: 0
BGP main routing table version 305345
BGP NSR Initial initsync version 12201 (Reached)
BGP NSR/ISSU Sync-Group versions 0/0
BGP scan interval 60 secs
Status codes: s suppressed, d damped, h history, * valid, > best
i - internal, r RIB-failure, S stale, N Nexthop-discard
Origin codes: i - IGP, e - EGP, ? - incomplete
Network Next Hop Metric LocPrf Weight Path
Route Distinguisher: 2001:1601 (default for vrf vrf1601)
*> 192.0.2.24/32 192.0.2.25 0 7501 i
*> 192.0.2.26/32 192.0.2.25 0 7501 i
*>i20.23.1.1/32 192.0.2.17 100 0 6553700 11501 i
*>i20.23.1.2/32 192.0.2.17 100 0 6553700 11501 i
Example:
Router-PE1# show bgp label table
Label Type VRF/RD Context
24041 IPv4 VRF Table vrf1601 -
24042 IPv4 VRF Table vrf1602 -
Example:
Router-PE1# show cef vrf vrf1601 192.0.2.27
192.0.2.27/32, version 743, internal 0x5000001 0x0 (ptr 0x8f932174) [1], 0x0 (0x8fa99990), 0xa08 (0x8f9fba58)
Updated Apr 20 12:33:47.840
Prefix Len 32, traffic index 0, precedence n/a, priority 3
via 192.0.2.17/32, 3 dependencies, recursive [flags 0x6000]
path-idx 0 NHID 0x0 [0x8c0e3148 0x0]
recursion-via-/32
next hop VRF - 'default', table - 0xe0000000
next hop 192.0.2.17/32 via 24039/0/21
next hop 192.0.2.28/32 Hu0/0/1/1 labels imposed {24059 24031}
Example:
Router-PE2# show mpls lsd forwarding
In_Label, (ID), Path_Info: <Type>
24030, (IPv4, 'default':4U, 192.0.2.10/32), 5 Paths
1/1: IPv4, 'default':4U, Hu0/0/0/19.2, nh=192.0.2.29, lbl=24155,
flags=0x0, ext_flags=0x0
24031, (VPN-VRF, 'vrf1601':4U), 1 Paths
1/1: PopLkup-v4, 'vrf1601':4U, ipv4
24032, (VPN-VRF, 'vrf1602':4U), 1 Paths
1/1: PopLkup-v4, 'vrf1602':4U, ipv4
Example:
Router-PE2# show mpls forwarding
Local Outgoing Prefix Outgoing Next Hop Bytes
Label Label or ID Interface Switched
------ ----------- ------------------ ------------ --------------- ------------
24019 Pop 192.0.2.30/32 Hu0/0/0/19 192.0.2.31 11151725032
24030 24155 192.0.2.10/32 Hu0/0/0/19 192.0.2.31 3639895
24031 Aggregate vrf1601: Per-VRF Aggr[V] \
vrf1601 0
Imposition Path: Verify if the BGP neighbor connection is established with the respective neighbor node.
Verify if BGP routes are advertised and learnt.
Verify BGP labels.
Verify if the route is downloaded in the respective VRF.
Disposition Path
Verify if the imposition and disposition labels are assigned and label bindings are exchanged for L3VPN prefixes.
Verify if the label update is received by the FIB.
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