세그먼트 라우팅 SP에서 엔드 투 엔드 연결 확인
소개
이 문서에서는 Cisco IOS®XR 소프트웨어를 사용하는 세그먼트 라우팅 SP(Service Provider)에서 엔드 투 엔드 연결을 확인하는 프로세스에 대해 설명합니다.
사전 요구 사항
요구 사항
다음 주제에 대한 지식을 보유하고 있으면 유용합니다.
- 기본 IP 라우팅에 대한 지식
- Cisco IOS 및 Cisco IOS XR 명령행에 대한 지식
사용되는 구성 요소
이 문서의 정보는 다음 소프트웨어 및 하드웨어 버전을 기반으로 합니다.
- Cisco IOS XR 소프트웨어가 포함된 라우터
- Cisco IOS 소프트웨어가 포함된 라우터
이 문서의 정보는 특정 랩 환경의 디바이스를 토대로 작성되었습니다. 이 문서에 사용된 모든 디바이스는 초기화된(기본) 컨피그레이션으로 시작되었습니다. 현재 네트워크가 작동 중인 경우 모든 명령의 잠재적인 영향을 미리 숙지하시기 바랍니다.
배경 정보
이 문서의 목적은 세그먼트 라우팅 클라우드를 생성하기 위한 기본 컨피그레이션 및 Cisco IOS XR 라우터에서 엔드 투 엔드 연결을 확인하는 방법을 시연하는 것입니다.
토폴로지
네트워크 토폴로지
초기 확인
BGP 컨피그레이션
CE-1
Loopback55는 라우터 CE-1의 LAN 쪽을 시뮬레이션합니다. eBGP를 통해 PE-1 인접 디바이스에 이 접두사를 알릴 수 있습니다.
CE-1#show run | section r b
router bgp 65535
bgp router-id 10.1.1.1
bgp log-neighbor-changes
redistribute connected
redistribute eigrp 10
neighbor 172.16.20.2 remote-as 8181
CE-1#show ip bgp neighbors 172.16.20.2 advertised-routes
BGP table version is 25, local router ID is 10.1.1.1
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter,
x best-external, a additional-path, c RIB-compressed,
t secondary path,
Origin codes: i - IGP, e - EGP, ? - incomplete
RPKI validation codes: V valid, I invalid, N Not found
Network Next Hop Metric LocPrf Weight Path
*> 10.1.1.1/32 0.0.0.0 0 32768 ?
*> 10.11.11.11/32 192.168.1.1 10880 32768 ?
*> 10.55.55.55/32 0.0.0.0 0 32768 ?
*> 172.16.20.0/30 0.0.0.0 0 32768 ?
*> 192.168.1.0 0.0.0.0 0 32768 ?
Total number of prefixes 5PE-1
이 라우터는 접두사 10.55.55.55/32을 수신하고 연결되었으므로 이제 서비스 공급자 클라우드에 알릴 수 있습니다.
RP/0/RP0/CPU0:PE-1#show run vrf
Fri Jan 27 15:07:10.465 UTC
vrf Yellow
address-family ipv4 unicast
import route-target
200:200
!
export route-target
200:200
!
RP/0/RP0/CPU0:PE-1#show run router bgp
Fri Jan 27 14:54:33.488 UTC
router bgp 8181
bgp router-id 10.2.2.2
address-family ipv4 unicast
!
address-family vpnv4 unicast
!
neighbor 10.3.3.3
remote-as 8181
update-source Loopback0
address-family vpnv4 unicast
route-policy PASS in
route-policy PASS out
!
!
vrf Yellow
rd 200:200
address-family ipv4 unicast
!
neighbor 172.16.20.1
remote-as 65535
address-family ipv4 unicast
route-policy PASS in
route-policy PASS out
as-override
!
RP/0/RP0/CPU0:PE-1#show bgp vrf Yellow ipv4 unicast neighbors 172.16.20.1 routes
Fri Jan 27 14:54:48.433 UTC
BGP VRF Yellow, state: Active
BGP Route Distinguisher: 200:200
VRF ID: 0x60000001
BGP router identifier 10.2.2.2, local AS number 8181
Non-stop routing is enabled
BGP table state: Active
Table ID: 0xe0000001 RD version: 73
BGP main routing table version 73
BGP NSR Initial initsync version 2 (Reached)
BGP NSR/ISSU Sync-Group versions 0/0
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: 200:200 (default for vrf Yellow)
*> 10.1.1.1/32 172.16.20.1 0 0 65535 ?
*> 10.11.11.11/32 172.16.20.1 10880 0 65535 ?
*> 10.55.55.55/32 172.16.20.1 0 0 65535 ?
*> 172.16.20.0/30 172.16.20.1 0 0 65535 ?
*> 192.168.1.0/24 172.16.20.1 0 0 65535 ?
Processed 5 prefixes, 5 paths
RP/0/RP0/CPU0:PE-1#ping vrf Yellow 10.55.55.55
Fri Jan 27 14:55:06.077 UTC
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.55.55.55, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 4/5/7 msCE-2
Loopback66은 CE-2 라우터의 LAN 쪽을 시뮬레이션합니다. CE-1과 유사한 방식으로 이 라우터는 eBGP를 통해 접두사를 인접 라우터 PE-2에 광고합니다.
CE-2#show run | section r b
router bgp 65535
bgp router-id 10.5.5.5
bgp log-neighbor-changes
redistribute connected
redistribute eigrp 10
neighbor 172.16.50.1 remote-as 8181
CE-2#show ip bgp neighbors 172.16.50.1 advertised-routes
BGP table version is 15, local router ID is 10.5.5.5
Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,
r RIB-failure, S Stale, m multipath, b backup-path, f RT-Filter,
x best-external, a additional-path, c RIB-compressed,
t secondary path,
Origin codes: i - IGP, e - EGP, ? - incomplete
RPKI validation codes: V valid, I invalid, N Not found
Network Next Hop Metric LocPrf Weight Path
*> 10.5.5.5/32 0.0.0.0 0 32768 ?
*> 10.22.22.22/32 192.168.4.1 10880 32768 ?
*> 10.66.66.66/32 0.0.0.0 0 32768 ?
*> 172.16.50.0/30 0.0.0.0 0 32768 ?
*> 192.168.4.0 0.0.0.0 0 32768 ?
Total number of prefixes 5PE-2
이 라우터는 접두사 10.66.66.66/32을 받았으며 이제 서비스 공급자 클라우드에 알릴 수 있습니다.
RP/0/RP0/CPU0:PE-2#show run vrf
Fri Jan 27 15:07:51.117 UTC
vrf Yellow
address-family ipv4 unicast
import route-target
200:200
!
export route-target
200:200
!
RP/0/RP0/CPU0:PE-2#show run router bgp
Fri Jan 27 14:59:56.957 UTC
router bgp 8181
bgp router-id 10.4.4.4
address-family ipv4 unicast
!
address-family vpnv4 unicast
!
neighbor 10.3.3.3
remote-as 8181
update-source Loopback0
address-family vpnv4 unicast
route-policy PASS in
route-policy PASS out
!
!
vrf Yellow
rd 200:200
address-family ipv4 unicast
!
neighbor 172.16.50.2
remote-as 65535
address-family ipv4 unicast
route-policy PASS in
route-policy PASS out
as-override
!
RP/0/RP0/CPU0:PE-2#show bgp vrf Yellow ipv4 unicast neighbors 172.16.50.2 routes
Fri Jan 27 15:00:10.383 UTC
BGP VRF Yellow, state: Active
BGP Route Distinguisher: 200:200
VRF ID: 0x60000001
BGP router identifier 10.4.4.4, local AS number 8181
Non-stop routing is enabled
BGP table state: Active
Table ID: 0xe0000001 RD version: 64
BGP main routing table version 64
BGP NSR Initial initsync version 2 (Reached)
BGP NSR/ISSU Sync-Group versions 0/0
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: 200:200 (default for vrf Yellow)
*> 10.5.5.5/32 172.16.50.2 0 0 65535 ?
*> 10.22.22.22/32 172.16.50.2 10880 0 65535 ?
*> 10.66.66.66/32 172.16.50.2 0 0 65535 ?
*> 172.16.50.0/30 172.16.50.2 0 0 65535 ?
*> 192.168.4.0/24 172.16.50.2 0 0 65535 ?
Processed 5 prefixes, 5 paths
RP/0/RP0/CPU0:PE-2#ping vrf Yellow 10.66.66.66
Fri Jan 27 15:00:26.020 UTC
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.66.66.66, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 3/26/120 msPE-1,Provider and PE-2의 라우팅 정보 상태
이 데모에서는 OSPF가 IGP 및 iBGP로 구성됩니다.
PE-1
OSPF 인접 디바이스는 UP이며 iBGP 세션은 Route Reflector인 10.3.3.3에 대한 세션입니다.
RP/0/RP0/CPU0:PE-1#show run router ospf
Fri Jan 27 15:09:23.910 UTC
router ospf 1
router-id 10.2.2.2
area 0
!
interface GigabitEthernet0/0/0/1
!
!
!
RP/0/RP0/CPU0:PE-1#show ospf neighbor
Fri Jan 27 15:09:31.435 UTC
* Indicates MADJ interface
# Indicates Neighbor awaiting BFD session up
Neighbors for OSPF 1
Neighbor ID Pri State Dead Time Address Interface
10.3.3.3 1 FULL/BDR 00:00:37 172.16.30.2 GigabitEthernet0/0/0/1
Neighbor is up for 16:59:30
Total neighbor count: 1
RP/0/RP0/CPU0:PE-1#show bgp vpnv4 unicast summary
Fri Jan 27 15:09:37.760 UTC
BGP router identifier 10.2.2.2, local AS number 8181
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 73
BGP NSR Initial initsync version 2 (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 73 73 73 73 73 0
Neighbor Spk AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down St/PfxRcd
10.3.3.3 0 8181 1010 997 73 0 0 16:24:45 5공급자 라우터
이 디바이스에서 경로 리플렉터 및 IBGP 세션 역할을 인접 디바이스 10.2.2.2 및 10.4.4.4와 설정했는지 확인할 수 있습니다
RP/0/RP0/CPU0:Provider#show run router ospf
Fri Jan 27 15:19:33.250 UTC
router ospf 1
router-id 10.3.3.3
area 0
!
interface GigabitEthernet0/0/0/1
!
interface GigabitEthernet0/0/0/2
!
RP/0/RP0/CPU0:Provider#show run router bgp
Fri Jan 27 15:11:08.321 UTC
router bgp 8181
bgp router-id 10.3.3.3
address-family ipv4 unicast
!
address-family vpnv4 unicast
!
neighbor-group IBGP
remote-as 8181
update-source Loopback0
!
neighbor 10.2.2.2
use neighbor-group IBGP
address-family vpnv4 unicast
route-policy PASS in
route-reflector-client
route-policy PASS out
next-hop-self
!
!
neighbor 10.4.4.4
use neighbor-group IBGP
address-family vpnv4 unicast
route-policy PASS in
route-reflector-client
route-policy PASS out
next-hop-self
!
RP/0/RP0/CPU0:Provider#show bgp vpnv4 unicast summary
Fri Jan 27 15:11:19.263 UTC
BGP router identifier 10.3.3.3, local AS number 8181
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 25
BGP NSR Initial initsync version 1 (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 25 25 25 25 25 0
Neighbor Spk AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down St/PfxRcd
10.2.2.2 0 8181 998 1011 25 0 0 16:26:27 5
10.4.4.4 0 8181 997 1009 25 0 0 16:24:25 5PE-2
OSPF 인접 디바이스가 작동 중이고 IBGP 세션이 Route Reflector인 10.3.3.3으로 설정됩니다.
RP/0/RP0/CPU0:PE-2#show run router ospf
Fri Jan 27 15:12:47.741 UTC
router ospf 1
router-id 10.4.4.4
area 0
!
interface GigabitEthernet0/0/0/2
!
RP/0/RP0/CPU0:PE-2#show ospf neighbor
Fri Jan 27 15:12:55.229 UTC
* Indicates MADJ interface
# Indicates Neighbor awaiting BFD session up
Neighbors for OSPF 1
Neighbor ID Pri State Dead Time Address Interface
10.3.3.3 1 FULL/DR 00:00:35 172.16.40.1 GigabitEthernet0/0/0/2
Neighbor is up for 17:01:21
Total neighbor count: 1
RP/0/RP0/CPU0:PE-2#show bgp vpnv4 unicast summary
Fri Jan 27 15:13:01.911 UTC
BGP router identifier 10.4.4.4, local AS number 8181
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 64
BGP NSR Initial initsync version 2 (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 64 64 64 64 64 0
Neighbor Spk AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down St/PfxRcd
10.3.3.3 0 8181 1011 998 64 0 0 16:26:08 5
RP/0/RP0/CPU0:PE-2#ping 10.2.2.2 source loopback0
Fri Jan 27 15:13:09.728 UTC
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.2.2.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 9/21/67 ms
RP/0/RP0/CPU0:PE-2#ping 10.3.3.3 source loopback0
Fri Jan 27 15:13:16.696 UTC
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.3.3.3, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 5/6/7 ms세그먼트 라우팅 컨피그레이션
PE-1
RP/0/RP0/CPU0:PE-1#show run router ospf
Fri Jan 27 16:15:56.479 UTC
router ospf 1
router-id 10.2.2.2
segment-routing mpls
area 0
segment-routing mpls
interface Loopback0
prefix-sid index 15
! 공급자
RP/0/RP0/CPU0:Provider#show run router ospf
Fri Jan 27 16:17:09.471 UTC
router ospf 1
router-id 10.3.3.3
segment-routing mpls
area 0
segment-routing mpls
interface Loopback0
prefix-sid index 16
!PE-2
RP/0/RP0/CPU0:PE-2#show run router ospf
Fri Jan 27 16:18:11.090 UTC
router ospf 1
router-id 10.4.4.4
segment-routing mpls
area 0
segment-routing mpls
interface Loopback0
prefix-sid index 17
!
최종 확인
CE-1은 CE-2 라우터에 위치한 인터페이스 루프백66에 연결할 수 있습니다. 다음 Traceroute 출력에서는 패킷이 10.66.66.66 접두사로 갈 때 레이블 스위치 경로를 사용함을 보여 줍니다. 라우터 PE-2를 통과할 때 레이블에서 접두사 SID 16017을 사용한다는 것을 관찰할 수도 있습니다.
CE-1#ping 10.66.66.66 source loopback0 Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 10.66.66.66, timeout is 2 seconds: Packet sent with a source address of 10.1.1.1 !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 9/13/32 ms CE-1#traceroute 10.66.66.66 source loopback0 Type escape sequence to abort. Tracing the route to 10.66.66.66 VRF info: (vrf in name/id, vrf out name/id) 1 172.16.20.2 6 msec 5 msec 5 msec 2 172.16.30.2 [MPLS: Labels 16017/24003 Exp 0] 12 msec 13 msec 16 msec 3 172.16.40.2 [MPLS: Label 24003 Exp 0] 15 msec 13 msec 12 msec 4 172.16.50.2 [AS 8181] 13 msec 11 msec *
컨피그레이션에서 absolute 옵션을 사용하지 않았으므로 레이블은 16000 값에서 시작하여 세그먼트 라우팅에 대해 구성된 접두사 sid를 추가했습니다.
RP/0/RP0/CPU0:PE-1#show cef 10.3.3.3/32
Fri Jan 27 21:32:42.813 UTC
10.3.3.3/32, version 43, labeled SR, internal 0x1000001 0x8110 (ptr 0xe3f6a00) [1], 0x600 (0xe593918), 0xa20 (0xee6e4b8)
Updated Jan 26 23:21:30.314
remote adjacency to GigabitEthernet0/0/0/1
Prefix Len 32, traffic index 0, precedence n/a, priority 1
gateway array (0xe3fbda8) reference count 3, flags 0x68, source rib (7), 0 backups
[3 type 4 flags 0x8401 (0xeeb1648) ext 0x0 (0x0)]
LW-LDI[type=1, refc=1, ptr=0xe593918, sh-ldi=0xeeb1648]
gateway array update type-time 1 Jan 26 23:21:30.314
LDI Update time Jan 26 23:21:30.315
LW-LDI-TS Jan 26 23:21:30.315
via 172.16.30.2/32, GigabitEthernet0/0/0/1, 8 dependencies, weight 0, class 0 [flags 0x0]
path-idx 0 NHID 0x0 [0xf427148 0xf4271e0]
next hop 172.16.30.2/32
remote adjacency
local label 16016 labels imposed {ImplNull}
Load distribution: 0 (refcount 3)
Hash OK Interface Address
0 Y GigabitEthernet0/0/0/1 remote
RP/0/RP0/CPU0:PE-1#show cef 10.4.4.4/32
Fri Jan 27 21:29:36.990 UTC
10.4.4.4/32, version 45, labeled SR, internal 0x1000001 0x8110 (ptr 0xe3f65c0) [1], 0x600 (0xe593e70), 0xa28 (0xee6e508)
Updated Jan 26 23:21:47.181
remote adjacency to GigabitEthernet0/0/0/1
Prefix Len 32, traffic index 0, precedence n/a, priority 1
gateway array (0xe3fbe90) reference count 3, flags 0x68, source rib (7), 0 backups
[2 type 5 flags 0x8401 (0xeeb16a8) ext 0x0 (0x0)]
LW-LDI[type=5, refc=3, ptr=0xe593e70, sh-ldi=0xeeb16a8]
gateway array update type-time 1 Jan 26 23:21:47.182
LDI Update time Jan 26 23:21:47.182
LW-LDI-TS Jan 26 23:21:47.182
via 172.16.30.2/32, GigabitEthernet0/0/0/1, 6 dependencies, weight 0, class 0 [flags 0x0]
path-idx 0 NHID 0x0 [0xf4271e0 0x0]
next hop 172.16.30.2/32
remote adjacency
local label 16017 labels imposed {16017}
Load distribution: 0 (refcount 2)
Hash OK Interface Address
0 Y GigabitEthernet0/0/0/1 remote CE-2는 CE-1 라우터에 있는 루프백55에도 연결할 수 있습니다.
CE-2#ping 10.55.55.55 source loopback66
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.55.55.55, timeout is 2 seconds:
Packet sent with a source address of 10.66.66.66
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 11/12/15 ms
CE-2#traceroute 10.55.55.55 source loopback66
Type escape sequence to abort.
Tracing the route to 10.55.55.55
VRF info: (vrf in name/id, vrf out name/id)
1 172.16.50.1 6 msec 5 msec 4 msec
2 172.16.40.1 [MPLS: Labels 16015/24003 Exp 0] 9 msec 16 msec 10 msec
3 172.16.30.1 [MPLS: Label 24003 Exp 0] 10 msec 13 msec 8 msec
4 172.16.20.1 [AS 8181] 11 msec 7 msec * MPLS 레이블
다음 출력에서는 Segment 라우팅 레이블이 트래픽을 엔드 투 엔드로 전환하는 데 사용됨을 확인할 수 있습니다.
RP/0/RP0/CPU0:PE-1#show mpls forwarding
Fri Jan 27 20:32:13.697 UTC
Local Outgoing Prefix Outgoing Next Hop Bytes
Label Label or ID Interface Switched
------ ----------- ------------------ ------------ --------------- ------------
16016 Pop SR Pfx (idx 16) Gi0/0/0/1 172.16.30.2 126880
16017 16017 SR Pfx (idx 17) Gi0/0/0/1 172.16.30.2 17292
24000 Pop SR Adj (idx 0) Gi0/0/0/1 172.16.30.2 0
24001 Aggregate 172.16.20.0/30[V] Yellow 11384
24002 Unlabelled 192.168.1.0/24[V] Gi0/0/0/0 172.16.20.1 0
24003 Unlabelled 10.55.55.55/32[V] Gi0/0/0/0 172.16.20.1 0
24004 Unlabelled 10.11.11.11/32[V] Gi0/0/0/0 172.16.20.1 0
24005 Unlabelled 10.1.1.1/32[V] Gi0/0/0/0 172.16.20.1 0 RP/0/RP0/CPU0:Provider#show mpls forwarding Fri Jan 27 20:33:14.878 UTC Local Outgoing Prefix Outgoing Next Hop Bytes Label Label or ID Interface Switched ------ ----------- ------------------ ------------ --------------- ------------ 16015 Pop SR Pfx (idx 15) Gi0/0/0/1 172.16.30.1 151687 16017 Pop SR Pfx (idx 17) Gi0/0/0/2 172.16.40.2 147701 24000 Pop SR Adj (idx 0) Gi0/0/0/1 172.16.30.1 0 24001 Pop SR Adj (idx 0) Gi0/0/0/2 172.16.40.2 0
RP/0/RP0/CPU0:PE-2#show mpls forwarding
Fri Jan 27 20:33:49.201 UTC
Local Outgoing Prefix Outgoing Next Hop Bytes
Label Label or ID Interface Switched
------ ----------- ------------------ ------------ --------------- ------------
16015 16015 SR Pfx (idx 15) Gi0/0/0/2 172.16.40.1 25304
16016 Pop SR Pfx (idx 16) Gi0/0/0/2 172.16.40.1 128619
24000 Pop SR Adj (idx 0) Gi0/0/0/2 172.16.40.1 0
24001 Aggregate 172.16.50.0/30[V] Yellow 1200
24002 Unlabelled 192.168.4.0/24[V] Gi0/0/0/3 172.16.50.2 0
24003 Unlabelled 10.66.66.66/32[V] Gi0/0/0/3 172.16.50.2 0
24004 Unlabelled 10.5.5.5/32[V] Gi0/0/0/3 172.16.50.2 0
24005 Unlabelled 10.22.22.22/32[V] Gi0/0/0/3 172.16.50.2 0 개정 이력
| 개정 | 게시 날짜 | 의견 |
|---|---|---|
1.0 |
30-Jan-2023 |
최초 릴리스 |
피드백