SR ISIS #
router isis 1
is-type level-2-only
net 49.0000.0000.0001.00
address-family ipv4 unicast
metric-style wide
segment-routing mpls
!
interface Loopback0
address-family ipv4 unicast
prefix-sid index 1
!
SR OSPF #
router ospf 1
router-id 10.1.2.2
segment-routing mpls
redistribute isis 1 route-policy Loopback
address-family ipv4 unicast
area 0
interface Loopback0
passive enable
prefix-sid index 2
SR BGP #
route-policy SID($SID)
set label-index $SID
end-policy
!
router bgp 4
bgp router-id 10.1.4.4
address-family ipv4 unicast
network 10.1.4.4/32 route-policy SID(4)
allocate-label all
!
neighbor 10.1.45.5
remote-as 5
address-family ipv4 labeled-unicast
route-policy pass in
route-policy pass out
!
!
!
SR 路由重分发案例 #
使用 router-policy 只重分发 Loopback （/32 prefix）。
route-policy Loopback
if destination in (0.0.0.0/0 eq 32) then
pass
else
drop
endif
end-policy
address-family ipv4 unicast
redistribute xx 1 route-policy Loopback
ISIS
RP/0/0/CPU0:R1#show isis database R2.00-00 detail verbose
Tue Nov 12 12:26:08.786 UTC
IS-IS 1 (Level-2) Link State Database
LSPID LSP Seq Num LSP Checksum LSP Holdtime/Rcvd ATT/P/OL
R2.00-00 0x0000021a 0x9162 380 /1199 0/0/0
Area Address: 49
Metric: 10 IS-Extended R1.00
Interface IP Address: 10.1.12.2
Neighbor IP Address: 10.1.12.1
Link Maximum SID Depth:
Subtype: 1, Value: 10
ADJ-SID: F:0 B:0 V:1 L:1 S:0 P:0 weight:0 Adjacency-sid:24001
NLPID: 0xcc
IP Address: 10.1.2.2
Metric: 10 IP-Extended 10.1.2.2/32
Prefix-SID Index: 2, Algorithm:0, R:0 N:1 P:0 E:0 V:0 L:0
Prefix Attribute Flags: X:0 R:0 N:1
Metric: 0 IP-Extended 10.1.3.3/32
Prefix-SID Index: 3, Algorithm:0, R:1 N:0 P:1 E:0 V:0 L:0
Prefix Attribute Flags: X:1 R:0 N:0
Metric: 0 IP-Extended 10.1.4.4/32
Prefix-SID Index: 4, Algorithm:0, R:1 N:0 P:1 E:0 V:0 L:0
Prefix Attribute Flags: X:1 R:0 N:0
Metric: 10 IP-Extended 10.1.12.0/24
Prefix Attribute Flags: X:0 R:0 N:0
Metric: 0 IP-Extended 10.1.5.5/32
Prefix-SID Index: 5, Algorithm:0, R:1 N:0 P:1 E:0 V:0 L:0
Prefix Attribute Flags: X:1 R:0 N:0
Hostname: R2
Router Cap: 10.1.2.2, D:0, S:0
Segment Routing: I:1 V:0, SRGB Base: 16000 Range: 8000
SR Algorithm:
Algorithm: 0
Algorithm: 1
Node Maximum SID Depth:
Subtype: 1, Value: 10
OSPF
RP/0/0/CPU0:R2#show ospf database opaque-as 7.0.0.1
Tue Nov 12 12:32:53.108 UTC
OSPF Router with ID (10.1.2.2) (Process ID 1)
Type-11 Opaque Link AS Link States
LS age: 651
Options: (No TOS-capability, DC)
LS Type: Opaque AS Link
Link State ID: 7.0.0.1
Opaque Type: 7
Opaque ID: 1
Advertising Router: 10.1.2.2
LS Seq Number: 800000d0
Checksum: 0x9b12
Length: 44
Extended Prefix TLV: Length: 20
Route-type: 5
AF : 0
Flags : 0x0
Prefix : 10.1.1.1/32
SID sub-TLV: Length: 8
Flags : 0x40
MTID : 0
Algo : 0
SID Index : 1
LS age: 359
Options: (No TOS-capability, DC)
LS Type: Opaque AS Link
Link State ID: 7.0.0.1
Opaque Type: 7
Opaque ID: 1
Advertising Router: 10.1.4.4
LS Seq Number: 800000d0
Checksum: 0x5647
Length: 44
Extended Prefix TLV: Length: 20
Route-type: 5
AF : 0
Flags : 0x0
Prefix : 10.1.5.5/32
SID sub-TLV: Length: 8
Flags : 0x40
MTID : 0
Algo : 0
SID Index : 5
RP/0/0/CPU0:R2#
BGP
RP/0/0/CPU0:R5#show route 10.1.4.4/32
Tue Nov 12 12:24:39.372 UTC
Routing entry for 10.1.4.4/32
Known via "bgp 5", distance 20, metric 0, [ei]-bgp, labeled unicast (3107), labeled SR
Tag 4, type external
Installed Nov 7 16:44:44.757 for 4d19h
Routing Descriptor Blocks
10.1.45.4, from 10.1.45.4, BGP external
Route metric is 0
No advertising protos.
RP/0/0/CPU0:R5#show bgp ipv4 labeled-unicast 10.1.4.4/32
Tue Nov 12 12:25:15.710 UTC
BGP routing table entry for 10.1.4.4/32
Versions:
Process bRIB/RIB SendTblVer
Speaker 7 7
Local Label: 16004
Last Modified: Nov 7 16:44:44.269 for 4d19h
Paths: (1 available, best #1)
Not advertised to any peer
Path #1: Received by speaker 0
Not advertised to any peer
4
10.1.45.4 from 10.1.45.4 (10.1.4.4)
Received Label 3
Origin IGP, metric 0, localpref 100, valid, external, best, group-best, labeled-unicast
Received Path ID 0, Local Path ID 1, version 7
Origin-AS validity: (disabled)
Prefix SID Attribute Size: 7
Label Index: 4