SR MPLS over Ipv6 Core network same as IPV4 because it uses mpls label for to deliver the packets end to end. SR MPLS will be on top on IPV6 Core. We can only use IPV6 without requirement of MPLS that concept is SRV6, SRV6 uses IPv6 + SRH to delivery the packet end to end. We will explore more on SRV6 in our upcoming blog
Lets prepare the IPV6 address and prepare them to enable IPV6 end to end.
Configured the router's interface with IPV6 address
Enabling ISIS to advertise the IPV6 capabilities to the neighbour routers
Enabling
cspf for ipv6
/configure router isis 1
traffic-engineering-option ipv6
Enabling IPv6 routeing within mt0
/configure router isis 1 ipv6-routing native
/configure router
segment-routing
sr-mpls
prefix-sids
"system"
ipv6-sid index 81
exit
exit
ISIS Database:
*A:PE1# show router isis 1 database level 2 PE1.00-00
===============================================================================
Rtr Base ISIS Instance 1 Database
===============================================================================
LSP ID Sequence Checksum Lifetime Attributes
-------------------------------------------------------------------------------
Displaying Level 2 database
-------------------------------------------------------------------------------
PE1.00-00 0xcb1 0xcdce 1138 L1L2
Level (2) LSP Count : 1
===============================================================================
*A:PE1# show router isis 1 database level 2 PE1.00-00 detail
===============================================================================
Rtr Base ISIS Instance 1 Database (detail)
===============================================================================
Displaying Level 2 database
-------------------------------------------------------------------------------
LSP ID : PE1.00-00 Level : L2
Sequence : 0xcb1 Checksum : 0xcdce Lifetime : 1135
Version : 1 Pkt Type : 20 Pkt Ver : 1
Attributes: L1L2 Max Area : 3 Alloc Len : 1492
SYS ID : 0010.0000.0001 SysID Len : 6 Used Len : 544
TLVs :
Area Addresses:
Area Address : (3) 49.0001
Supp Protocols:
Protocols : IPv4
Protocols : IPv6
IS-Hostname : PE1
Router ID :
Router ID : 1.0.0.1
TE Router ID v6 :
Router ID : fd00::1
Router Cap : 1.0.0.1, D:0, S:0
TE Node Cap : B E M P
SR Cap: IPv4 MPLS-IPv6
SRGB Base:20000, Range:100
SR Alg: metric based SPF, 129, 130
Node MSD Cap: BMI : 12 ERLD : 15
FAD Sub-Tlv:
Flex-Algorithm : 129
Metric-Type : delay
Calculation-Type : 0
Priority : 100
Flags: M
FAD Sub-Tlv:
Flex-Algorithm : 130
Metric-Type : igp
Calculation-Type : 0
Priority : 100
Flags: M
Include Any Admin Group: 0x100000
I/F Addresses :
I/F Address : 1.0.0.1
I/F Address : 192.1.1.1
I/F Address : 10.1.5.1
I/F Address : 10.1.21.1
I/F Address : 192.168.0.2
I/F Addresses IPv6 :
IPv6 Address : fd00::1
IPv6 Address : fd00:10:1:2::1
IPv6 Address : fd00:10:1:11::1
IPv6 Address : fd00:10:5:1::1
TE IS Nbrs :
Nbr : PE5.01
Default Metric : 10
Sub TLV Len : 59
IF Addr : 10.1.5.1
IPv6 Addr : fd00:10:5:1::1
TE APP LINK ATTR :
SABML-flag:Non-Legacy SABM-flags: S
MaxLink BW: 10000000 kbps
TE APP LINK ATTR :
SABML-flag:Non-Legacy SABM-flags: X
Admin Grp : 0x100000
LAN-Adj-SID: 00 10 00 00 00 05 Flags:v4VL Weight:0 Label:524272
TE IS Nbrs :
Nbr : PE2.02
Default Metric : 10
Sub TLV Len : 61
IF Addr : 10.1.21.1
IPv6 Addr : fd00:10:1:2::1
TE APP LINK ATTR :
SABML-flag:Non-Legacy SABM-flags: S
MaxLink BW: 10000000 kbps
LAN-Adj-SID: 00 10 00 00 00 02 Flags:v4VL Weight:0 Label:524273
LAN-Adj-SID: 00 10 00 00 00 02 Flags:v6VL Weight:0 Label:524286
TE IS Nbrs :
Nbr : ASBR1.03
Default Metric : 10
Sub TLV Len : 48
IF Addr : 192.1.1.1
IPv6 Addr : fd00:10:1:11::1
TE APP LINK ATTR :
SABML-flag:Non-Legacy SABM-flags: S
MaxLink BW: 10000000 kbps
LAN-Adj-SID: 01 10 00 00 00 01 Flags:v4VL Weight:0 Label:524275
TE IP Reach :
Default Metric : 10
Control Info: , prefLen 24
Prefix : 192.168.0.0
Default Metric : 10
Control Info: , prefLen 24
Prefix : 192.1.1.0
Default Metric : 10
Control Info: , prefLen 24
Prefix : 10.1.5.0
Default Metric : 10
Control Info: , prefLen 24
Prefix : 10.1.21.0
Default Metric : 0
Control Info: S, prefLen 32
Prefix : 1.0.0.1
Sub TLV :
Prefix-SID Index:11, Algo:0, Flags:NnP
IPv6 Reach:
Metric: ( IS) 0
Prefix : fd00::1/128
Sub TLV :
Prefix-SID Index:71, Algo:0, Flags:NnP
Metric: ( I ) 10
Prefix : fd00:10:1:2::/64
Metric: ( I ) 10
Prefix : fd00:10:1:11::/64
Metric: ( I ) 10
Prefix : fd00:10:5:1::/64
Level (2) LSP Count : 1
Enabling SR-TE LSP with IPv6
lsp "tope3-ipv6" sr-te
to fd00::3
path-computation-method
local-cspf
metric-type te
max-sr-labels 5
additional-frr-labels 2
primary "local-cspf"
exit
no shutdown
exit
no shutdown
*A:PE5# show router mpls sr-te-lsp family ipv6 detail
=====================================================================
MPLS
SR-TE LSPs (Originating) (Detail)
=====================================================================
Legend : + - Inherited
=====================================================================
Type
: Originating
---------------------------------------------------------------------
LSP
Name : tope3-ipv6
LSP
Type : SrTeLsp LSP Tunnel ID : 3
LSP
Index : 65538 TTM Tunnel Id : 655364
From : fd00::5
To : fd00::3
Adm
State : Up Oper State : Up
LSP
Up Time : 0d 00:06:50 LSP Down Time : 0d 00:00:00
Transitions : 1 Path Changes : 1
Retry
Limit : 0 Retry Timer : 30 sec
Hop
Limit : 255 Negotiated MTU : 8902
PathCompMethod : local-cspf
FallbkPathComp : not-applicable
Metric : N/A Metric Type : te
Local
Sr Protec*: preferred
Label Stack Reduction: Disabled
Load
Bal Wt : N/A ClassForwarding : Disabled
Include
Grps : Exclude Grps :
None None
Egress
Stats : Disabled
BFD
Template : None BFD Ping Intvl : N/A
BFD
Enable : False BFD Failure-action : None
WaitForUpTimer : 4
ReturnPathLabel
: None
BFD
Source Addr : None
Revert
Timer : Disabled Next Revert In : N/A
Entropy
Label : Enabled+ Oper Entropy Label : Enabled
Negotiated
EL : Disabled Override Tunnel ELC : Disabled
VprnAutoBind : Enabled
IGP
Shortcut : Enabled BGP Shortcut : Enabled
IGP
LFA : Disabled IGP Rel Metric : Disabled
AllowSrOverSrte
: Disabled
BGPTransTun : Enabled
Oper
Metric : 16777215
PCE
Report : Disabled+
PCE
Control : Disabled
Max
SR Labels : 5 Additional FRR Labels:
2
Binding
SID : 0
Path
Profile : None
Admin Tags : None
Primary(a) : local-cspf
Up
Time : 0d 00:06:51
Bandwidth : 0 Mbps
=====================================================================
*
indicates that the corresponding row element may have been truncated.
*A:PE5#
*A:PE5#
show router mpls sr-te-lsp family ipv6 path detail
=====================================================================
MPLS
SR-TE LSP
Path (Detail)
=====================================================================
Legend
:
S
- Strict
L - Loose
A-SID
- Adjacency SID
N-SID - Node SID
+
- Inherited
=====================================================================
LSP
SR-TE tope3-ipv6
Path local-cspf
---------------------------------------------------------------------
LSP
Name : tope3-ipv6
Path
LSP ID : 13824
From : fd00::5
To : fd00::3
Admin
State : Up Oper State : Up
Path
Name : local-cspf
Path
Type : Primary
Path
Admin : Up Path Oper : Up
Path
Up Time : 0d 00:07:11 Path Down Time : 0d 00:00:00
Retry
Limit : 0 Retry Timer : 30 sec
Retry
Attempt : 0 Next Retry In : 0 sec
PathCompMethod : local-cspf OperPathCompMethod: local-cspf
MetricType : te Oper MetricType : te
LocalSrProt : preferred Oper LocalSrProt : preferred
LabelStackRed : Disabled Oper LabelStackRed: Disabled
Bandwidth : No Reservation Oper Bandwidth : 0 Mbps
Hop
Limit : 255 Oper HopLimit : 255
Setup
Priority : 7 Oper SetupPriority: 7
Hold
Priority : 0 Oper HoldPriority : 0
DelayMetricLimit
: No limit
OperDelayMetricLim: N/A
Inter-area : N/A
PCE
Updt ID : 0 PCE Updt State : None
PCE
Upd Fail Code: noError
PCE
Report : Disabled+ Oper PCE Report : Disabled
PCE
Control : Disabled Oper PCE Control : Disabled
Include
Groups : Oper IncludeGroups:
None None
Exclude
Groups : Oper ExcludeGroups:
None None
Last
Resignal : n/a
IGP/TE/Del
Metric: 40 Oper
Metric : 16777215
Oper
MTU : 8902 Path Trans : 1
Degraded : False
Failure
Code : noError
Failure
Node : n/a
Explicit
Hops :
No Hops Specified
Actual
Hops :
fd00:10:5:1::1
(fd00::1)(A-SID)
Record Label : 524281
fd00:10:1:11::11
-> (fd00::11)(A-SID)
Record Label : 524276
fd00:10:13:11::13
-> (fd00::13)(A-SID)
Record Label : 524285
fd00:10:13:3::3
-> (fd00::3)(A-SID)
Record Label : 524286
BFD
Configuration and State
Template : None Ping Interval : N/A
Enable : False State : notApplicable
ReturnPathLabel : None
BFD
Source Addr : None
WaitForUpTimer : 4 sec OperWaitForUpTimer: 0 sec
WaitForUpTmLeft : 0
StartFail
Rsn : N/A
=====================================================================
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