Amaç :
Point-to-Point Ethernet Over MPLS için interface konfiglerini, Cisco EVC Frame Work veya klasik subinterface methodları arasındaki kullanım farklarını ve Custemer Paketlerinin (Vlan’lı veya Vlan’sız) taşınmasını anlamak.
İlk olarak EVC Frame work ve Point-to-Point MPLS L2VPN konfigurasyonu ve çalışma şeklini anlamak üzerine iki adet Cisco ASR 1002 arka arkaya bağlımak sureti ile test’ler planlanmıştır.
Daha sonra Cisco ME-3600 switch kullanılarak uygulamalar incelenmiştir.
Customer Vlan’ın taşınması sırasında L2 QoS bilgisinin, cos bit’i, taşınmasına gösterilmiştir.
Testler sırasında Cisco EVC frame work kullanımı ve normal subinterface yöntemi ile olan farklığınu gösterilmiştir.
Ayrıca control word bilgisinin pseudowire üzerindeki etkisi incelenmiştir.
ASR 1000 için ;
Ana inteface altında kurulan xconnectler default’da type 5 olarak kurulur ve vlan bilgisini iletir.
Subinterface altında kurulan xconnectler defualt’da type 4 olarak konfigure edilir ve vlan bilgisini iletmez. Fakat pw-class kullanarak interworking vlan yapılır ise vlan bilgisinin iletilmesi sağlanabilir.
EVC konfiği ile kurulan xconnectler default olarak type 4 kurulur ve vlan bilgisini iletir. Eğer rewrite komutu ile bir silme veya ekleme işlemi yapılmış ise buna göre davranılır.
Dolayısı ile EVC ve subint kullanmanın farklı vlan bilgisinin iletilip iletilmeyeceğini belirler.
- Mümkün olduğunca aggeragation noktalarında PE interfacelerinde EVC frame work kullanılmalıdır. ASR1K ve ASR9K serisinde EVC kullanımı desteklenmektedir.
- S-Vlan bilgisi pseudowire üzerinden iletilmelidir.
- Pseudowire kullanımında MPLS exp biti ile paketler uygun backbone qos sınıfına sokulmalıdır.
- Control Word kullanımı sadece ilk vlag tag’in taşıma şeklini belirler.
- Her test için packet capture alınmıştır.
Genel Testler :
Genel Topology :
Test 1 Ethernet Vlan – Subinterface :
Konfigurasyonlar :
PE -2 :
interface GigabitEthernet0/0/1
mtu 9216
no ip address
negotiation auto
cdp enable
!
interface GigabitEthernet0/0/1.50
encapsulation dot1Q 50
xconnect 1.1.1.1.7 4 encapsulation mpls
!
interface GigabitEthernet0/0/2
no ip address
negotiation auto
cdp enable
!
interface GigabitEthernet0/0/2.50
encapsulation dot1Q 50 second-dot1q 200
ip vrf forwarding test
ip address 5.5.5.2 255.255.255.0
!
PE-3 :
interface GigabitEthernet0/0/1
mtu 9216
no ip address
negotiation auto
!
interface GigabitEthernet0/0/1.50
encapsulation dot1Q 50
xconnect 1.1.1.1.6 4 encapsulation mpls
!
interface GigabitEthernet0/0/2
no ip address
negotiation auto
!
interface GigabitEthernet0/0/2.50
encapsulation dot1Q 50 second-dot1q 200
ip vrf forwarding test
ip address 5.5.5.3 255.255.255.0
service-policy output mark-out
!
PE-3#ping vrf test 5.5.5.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 5.5.5.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/1/1 ms
Kontroller :
PE-2#show mpls l2transport vc detail
Local interface: Gi0/0/1.50 up, line protocol up, Eth VLAN 50 up
Interworking type is Ethernet
Destination address: 1.1.1.1.7, VC ID: 4, VC status: up
Output interface: Gi0/0/0, imposed label stack {21}
Preferred path: not configured
Default path: active
Next hop: 10.177.183.3
Create time: 00:00:06, last status change time: 00:00:06
Last label FSM state change time: 00:00:06
Signaling protocol: LDP, peer 1.1.1.1.7:0 up
Targeted Hello: 1.1.1.1.6(LDP Id) -> 1.1.1.1.7, LDP is UP
Status TLV support (local/remote) : enabled/supported
LDP route watch : enabled
Label/status state machine : established, LruRru
Last local dataplane status rcvd: No fault
Last BFD dataplane status rcvd: Not sent
Last BFD peer monitor status rcvd: No fault
Last local AC circuit status rcvd: No fault
Last local AC circuit status sent: No fault
Last local PW i/f circ status rcvd: No fault
Last local LDP TLV status sent: No fault
Last remote LDP TLV status rcvd: No fault
Last remote LDP ADJ status rcvd: No fault
MPLS VC labels: local 46, remote 21
Group ID: local 0, remote 0
MTU: local 9216, remote 9216
Remote interface description:
Sequencing: receive disabled, send disabled
Control Word: On (configured: autosense)
SSO Descriptor: 1.1.1.1.7/4, local label: 46
Dataplane:
SSM segment/switch IDs: 4363/4362 (used), PWID: 4
VC statistics:
transit packet totals: receive 0, send 0
transit byte totals: receive 0, send 0
transit packet drops: receive 0, seq error 0, send 0
PE-3#show mpls l2transport vc detail
Local interface: Gi0/0/1.50 up, line protocol up, Eth VLAN 50 up
Destination address: 1.1.1.1.6, VC ID: 4, VC status: down
Output interface: none, imposed label stack {}
Preferred path: not configured
Default path: no route
No adjacency
Create time: 00:00:14, last status change time: 00:00:14
Signaling protocol: LDP, peer 1.1.1.1.6:0 up
Targeted Hello: 1.1.1.1.7(LDP Id) -> 1.1.1.1.6, LDP is DOWN, no binding
Status TLV support (local/remote) : enabled/None (no remote binding)
LDP route watch : enabled
Label/status state machine : local ready, LruRnd
Last local dataplane status rcvd: No fault
Last BFD dataplane status rcvd: Not sent
Last local SSS circuit status rcvd: No fault
Last local SSS circuit status sent: Not sent
Last local LDP TLV status sent: No fault
Last remote LDP TLV status rcvd: None (no remote binding)
Last remote LDP ADJ status rcvd: None (no remote binding)
MPLS VC labels: local 21, remote unassigned
PWID: 4170
Group ID: local 0, remote unknown
MTU: local 9216, remote unknown
Remote interface description:
Sequencing: receive disabled, send disabled
Control Word: On (configured: autosense)
VC statistics:
transit packet totals: receive 0, send 0
transit byte totals: receive 0, send 0
transit packet drops: receive 0, seq error 0, send 0
Sonuç :
C-Vlan bilgisi taşınıyor. Dolayısı ile CoS değeride transparent olarak taşınıyor. C-Vlan başlık bilgisi karşıya iletiliyor. S-Vlan bilgisi karşıya taşınmıyor dolayısı ile iki uçda hangi S-Vlanların kullanıldığının bir önemi yok.
Test 2 Ethernet Vlan Mode Control Word Off :
Test 1’deki topology kullanlıyor. Fakat kontrol word off olarak negotiate etmek için pseudowire-class kullanılarak control word off yapılıyor. Tek taraflı kapamak yeterli.
Konfigurasyon :
PE-3 :
!
pseudowire-class test
encapsulation mpls
no control-word
!
interface GigabitEthernet0/0/1
mtu 9216
no ip address
negotiation auto
!
interface GigabitEthernet0/0/1.50
encapsulation dot1Q 50
xconnect 1.1.1.1.6 4 encapsulation mpls pw-class test
!
Kontrol :
PE-3#show mpls l2transport vc detail
Local interface: Gi0/0/1.50 up, line protocol up, Eth VLAN 50 up
Destination address: 1.1.1.1.6, VC ID: 4, VC status: up
Output interface: Gi0/0/0, imposed label stack {61}
Preferred path: not configured
Default path: active
Next hop: 10.177.183.2
Create time: 00:00:10, last status change time: 00:00:05
Signaling protocol: LDP, peer 1.1.1.1.6:0 up
Targeted Hello: 1.1.1.1.7(LDP Id) -> 1.1.1.1.6, LDP is UP
Status TLV support (local/remote) : enabled/supported
LDP route watch : enabled
Label/status state machine : established, LruRru
Last local dataplane status rcvd: No fault
Last BFD dataplane status rcvd: Not sent
Last local SSS circuit status rcvd: No fault
Last local SSS circuit status sent: No fault
Last local LDP TLV status sent: No fault
Last remote LDP TLV status rcvd: No fault
Last remote LDP ADJ status rcvd: No fault
MPLS VC labels: local 18, remote 61
PWID: 4185
Group ID: local 0, remote 0
MTU: local 9216, remote 9216
Remote interface description:
Sequencing: receive disabled, send disabled
Control Word: Off
VC statistics:
transit packet totals: receive 0, send 0
transit byte totals: receive 0, send 0
transit packet drops: receive 0, seq error 0, send 0
Daha sonra tekrar control word on yapıldı. Bunun için iki taraflı interface’ler kapatılıp açıldı.
Packet capture içerisinde iki bilgide görülmektedir.
Sonuç:
Burada önemli olan control word bilgisidir. Control word kullanılıp kullanılmadığına göre vlan bilgisinin iletim methodu değişiyor. Eğer control word on olarak devre kurulmuş ise vlan header’ı olduğu gibi değişiyor. Eğer off olarak devre kurulmuş ise source ve destination mac addresleri kullanılarak vlan headarı olmadan bilgi iletiliyor. Source mac adresinin son iki hexadecimal bilgisi Vlan bilgisini içeriyor. Sondan 3. Hexadecimal bilgisin ilk 3 biti ise cos bilgisini içeriyior. Diğer alanlarda bir şekilde kullanılıyordur. 5-8 hexadecimal bilgisi ethertype belirtiyor.
Test 3 Ethernet Port Mod :
Control word on ve off olarak test edilmiştir.
Konfigurasyon :
PE-2:
!
interface GigabitEthernet0/0/1
mtu 9216
no ip address
negotiation auto
cdp enable
xconnect 1.1.1.1.7 4 encapsulation mpls
!
PE-3:
!
pseudowire-class test
encapsulation mpls
!
interface GigabitEthernet0/0/1
mtu 9216
no ip address
negotiation auto
xconnect 1.1.1.1.6 4 encapsulation mpls pw-class test
!
Kontrol :
PE-3#show mpls l2transport vc detail
Local interface: Gi0/0/1 up, line protocol up, Ethernet up
Destination address: 1.1.1.1.6, VC ID: 4, VC status: up
Output interface: Gi0/0/0, imposed label stack {51}
Preferred path: not configured
Default path: active
Next hop: 10.177.183.2
Create time: 00:11:07, last status change time: 00:11:07
Last label FSM state change time: 00:11:07
Signaling protocol: LDP, peer 1.1.1.1.6:0 up
Targeted Hello: 1.1.1.1.7(LDP Id) -> 1.1.1.1.6, LDP is UP
Status TLV support (local/remote) : enabled/supported
LDP route watch : enabled
Label/status state machine : established, LruRru
Last local dataplane status rcvd: No fault
Last BFD dataplane status rcvd: Not sent
Last BFD peer monitor status rcvd: No fault
Last local AC circuit status rcvd: No fault
Last local AC circuit status sent: No fault
Last local PW i/f circ status rcvd: No fault
Last local LDP TLV status sent: No fault
Last remote LDP TLV status rcvd: No fault
Last remote LDP ADJ status rcvd: No fault
MPLS VC labels: local 19, remote 51
Group ID: local 0, remote 0
MTU: local 9216, remote 9216
Remote interface description:
Sequencing: receive disabled, send disabled
Control Word: On (configured: autosense)
SSO Descriptor: 1.1.1.1.6/4, local label: 19
Dataplane:
SSM segment/switch IDs: 4112/4111 (used), PWID: 1
VC statistics:
transit packet totals: receive 13, send 1
transit byte totals: receive 4589, send 99
transit packet drops: receive 0, seq error 0, send 0
!
PE-2#show mpls l2transport vc detail
Local interface: Gi0/0/1 up, line protocol up, Ethernet up
Destination address: 1.1.1.1.7, VC ID: 4, VC status: up
Output interface: Gi0/0/0, imposed label stack {19}
Preferred path: not configured
Default path: active
Next hop: 10.177.183.3
Create time: 00:45:53, last status change time: 00:11:27
Last label FSM state change time: 00:11:27
Last peer autosense occurred at: 00:43:35
Signaling protocol: LDP, peer 1.1.1.1.7:0 up
Targeted Hello: 1.1.1.1.6(LDP Id) -> 1.1.1.1.7, LDP is UP
Status TLV support (local/remote) : enabled/supported
LDP route watch : enabled
Label/status state machine : established, LruRru
Last local dataplane status rcvd: No fault
Last BFD dataplane status rcvd: Not sent
Last BFD peer monitor status rcvd: No fault
Last local AC circuit status rcvd: No fault
Last local AC circuit status sent: No fault
Last local PW i/f circ status rcvd: No fault
Last local LDP TLV status sent: No fault
Last remote LDP TLV status rcvd: No fault
Last remote LDP ADJ status rcvd: No fault
MPLS VC labels: local 51, remote 19
Group ID: local 0, remote 0
MTU: local 9216, remote 9216
Remote interface description:
Sequencing: receive disabled, send disabled
Control Word: On (configured: autosense)
SSO Descriptor: 1.1.1.1.7/4, local label: 51
Dataplane:
SSM segment/switch IDs: 4422/4416 (used), PWID: 5
VC statistics:
transit packet totals: receive 16, send 65
transit byte totals: receive 1540, send 21218
transit packet drops: receive 0, seq error 0, send 0
PE-3 : control word off
!
pseudowire-class test
encapsulation mpls
no control-word
!
PE-3#show mpls l2transport vc detail
Local interface: Gi0/0/1 up, line protocol up, Ethernet up
Destination address: 1.1.1.1.6, VC ID: 4, VC status: up
Output interface: Gi0/0/0, imposed label stack {50}
Preferred path: not configured
Default path: active
Next hop: 10.177.183.2
Create time: 00:01:17, last status change time: 00:00:55
Last label FSM state change time: 00:00:55
Last peer autosense occurred at: 00:01:01
Signaling protocol: LDP, peer 1.1.1.1.6:0 up
Targeted Hello: 1.1.1.1.7(LDP Id) -> 1.1.1.1.6, LDP is UP
Status TLV support (local/remote) : enabled/supported
LDP route watch : enabled
Label/status state machine : established, LruRru
Last local dataplane status rcvd: No fault
Last BFD dataplane status rcvd: Not sent
Last BFD peer monitor status rcvd: No fault
Last local AC circuit status rcvd: No fault
Last local AC circuit status sent: No fault
Last local PW i/f circ status rcvd: No fault
Last local LDP TLV status sent: No fault
Last remote LDP TLV status rcvd: No fault
Last remote LDP ADJ status rcvd: No fault
MPLS VC labels: local 23, remote 50
Group ID: local 0, remote 0
MTU: local 9216, remote 9216
Remote interface description:
Sequencing: receive disabled, send disabled
Control Word: Off
SSO Descriptor: 1.1.1.1.6/4, local label: 23
Dataplane:
SSM segment/switch IDs: 8212/8210 (used), PWID: 1
VC statistics:
transit packet totals: receive 7, send 5
transit byte totals: receive 992, send 642
transit packet drops: receive 0, seq error 0, send 0
PE-2#show mpls l2transport vc detail
Local interface: Gi0/0/1 up, line protocol up, Ethernet up
Destination address: 1.1.1.1.7, VC ID: 4, VC status: up
Output interface: Gi0/0/0, imposed label stack {23}
Preferred path: not configured
Default path: active
Next hop: 10.177.183.3
Create time: 00:48:02, last status change time: 00:01:07
Last label FSM state change time: 00:01:07
Last peer autosense occurred at: 00:01:07
Signaling protocol: LDP, peer 1.1.1.1.7:0 up
Targeted Hello: 1.1.1.1.6(LDP Id) -> 1.1.1.1.7, LDP is UP
Status TLV support (local/remote) : enabled/supported
LDP route watch : enabled
Label/status state machine : established, LruRru
Last local dataplane status rcvd: No fault
Last BFD dataplane status rcvd: Not sent
Last BFD peer monitor status rcvd: No fault
Last local AC circuit status rcvd: No fault
Last local AC circuit status sent: No fault
Last local PW i/f circ status rcvd: No fault
Last local LDP TLV status sent: No fault
Last remote LDP TLV status rcvd: No fault
Last remote LDP ADJ status rcvd: No fault
MPLS VC labels: local 50, remote 23
Group ID: local 0, remote 0
MTU: local 9216, remote 9216
Remote interface description:
Sequencing: receive disabled, send disabled
Control Word: Off (configured: autosense)
SSO Descriptor: 1.1.1.1.7/4, local label: 50
Dataplane:
SSM segment/switch IDs: 4423/4416 (used), PWID: 5
VC statistics:
transit packet totals: receive 26, send 79
transit byte totals: receive 2644, send 23790
transit packet drops: receive 0, seq error 0, send 0
Sonuç :
S-Vlan ve C-Vlan bilgisi pseudowire üzerinden taşınıyor.Packet capture ilk control word on ikinci olarak control word off kullanım görülüyor. Her iki durumdada C-Vlan Headar ve CoS bilgisi taşınıyor. Control word bilgisi S-Vlan taşınma methodunu belirliyor.
Test 4 EFC Frame Work Kullanımı :
Konfigurasyon :
PE-2:
!
interface GigabitEthernet0/0/1
mtu 9216
no ip address
negotiation auto
cdp enable
service instance 1 ethernet
encapsulation dot1q 50
xconnect 1.1.1.1.6 4 encapsulation mpls pw-class test
!
!
PE-3:
interface GigabitEthernet0/0/1
mtu 9216
no ip address
negotiation auto
service instance 1 ethernet
encapsulation dot1q 50
xconnect 1.1.1.1.7 4 encapsulation mpls
!
Kontrol :
PE-3#show mpls l2transport vc detail
Local interface: Gi0/0/1 up, line protocol up, Eth VLAN 50 up
Interworking type is Ethernet
Destination address: 1.1.1.1.6, VC ID: 4, VC status: up
Output interface: Gi0/0/0, imposed label stack {75}
Preferred path: not configured
Default path: active
Next hop: 10.177.183.2
Create time: 00:21:03, last status change time: 00:01:41
Last label FSM state change time: 00:01:41
Signaling protocol: LDP, peer 1.1.1.1.6:0 up
Targeted Hello: 1.1.1.1.7(LDP Id) -> 1.1.1.1.6, LDP is UP
Status TLV support (local/remote) : enabled/supported
LDP route watch : enabled
Label/status state machine : established, LruRru
Last local dataplane status rcvd: No fault
Last BFD dataplane status rcvd: Not sent
Last BFD peer monitor status rcvd: No fault
Last local AC circuit status rcvd: No fault
Last local AC circuit status sent: No fault
Last local PW i/f circ status rcvd: No fault
Last local LDP TLV status sent: No fault
Last remote LDP TLV status rcvd: No fault
Last remote LDP ADJ status rcvd: No fault
MPLS VC labels: local 20, remote 75
Group ID: local 0, remote 0
MTU: local 9216, remote 9216
Remote interface description:
Sequencing: receive disabled, send disabled
Control Word: On
SSO Descriptor: 1.1.1.1.6/4, local label: 20
Dataplane:
SSM segment/switch IDs: 4125/8216 (used), PWID: 1
VC statistics:
transit packet totals: receive 26, send 38
transit byte totals: receive 2940, send 5112
transit packet drops: receive 21, seq error 0, send 0
Control word kapalı:
PE-3:
pseudowire-class test
encapsulation mpls
no control-word
PE-3#show mpls l2transport vc detail
Local interface: Gi0/0/1 up, line protocol up, Eth VLAN 50 up
Interworking type is Ethernet
Destination address: 1.1.1.1.6, VC ID: 4, VC status: up
Output interface: Gi0/0/0, imposed label stack {45}
Preferred path: not configured
Default path: active
Next hop: 10.177.183.2
Create time: 00:00:42, last status change time: 00:00:31
Last label FSM state change time: 00:00:31
Last peer autosense occurred at: 00:00:37
Signaling protocol: LDP, peer 1.1.1.1.6:0 up
Targeted Hello: 1.1.1.1.7(LDP Id) -> 1.1.1.1.6, LDP is UP
Status TLV support (local/remote) : enabled/supported
LDP route watch : enabled
Label/status state machine : established, LruRru
Last local dataplane status rcvd: No fault
Last BFD dataplane status rcvd: Not sent
Last BFD peer monitor status rcvd: No fault
Last local AC circuit status rcvd: No fault
Last local AC circuit status sent: No fault
Last local PW i/f circ status rcvd: No fault
Last local LDP TLV status sent: No fault
Last remote LDP TLV status rcvd: No fault
Last remote LDP ADJ status rcvd: No fault
MPLS VC labels: local 22, remote 45
Group ID: local 0, remote 0
MTU: local 9216, remote 9216
Remote interface description:
Sequencing: receive disabled, send disabled
Control Word: Off
SSO Descriptor: 1.1.1.1.6/4, local label: 22
Dataplane:
SSM segment/switch IDs: 8224/4126 (used), PWID: 1
VC statistics:
transit packet totals: receive 2, send 2
transit byte totals: receive 244, send 280
transit packet drops: receive 0, seq error 0, send 0
Sonuç :
Control Word kullanılsın veya kullanılmasın S-Vlan ve C-Vlan karşıya iletiliyor. Eğer yaratılan service instance içerisinde rewrite ingress tag pop 1 symetric komutu kullanılsa idi, S-Vlan bilgisi karşıya taşınmıyacakdı.
Test 5 Ethernet port mode ve vlan mode birlikte kullanımı :
Konfigurayon :
Eğer Vlan tarafında service instance kullanılmaz ise
PE-2:
!
interface GigabitEthernet0/0/1
mtu 9216
no ip address
negotiation auto
xconnect 1.1.1.1.6 4 encapsulation mpls
!
PE-3 :
pseudowire-class test
encapsulation mpls
!
interface GigabitEthernet0/0/1
mtu 9216
no ip address
negotiation auto
!
interface GigabitEthernet0/0/1.50
encapsulation dot1Q 50
xconnect 1.1.1.1.6 4 encapsulation mpls pw-class test
!
Bu durumda karşı tarafı PE-3’den PE-2 S vlan taşınmaz dolayısı ile erişim olmaz. S vlanı taşımanın tek yolu PE-3’de ya port moda yada service instance kullanmakdır. Port mod kullanılır ise zaten port moda port mod olur.
Bu test’de service instance kullanımını denedik.
Kontrol :
PE-3#show mpls l2transport vc detail
Local interface: Gi0/0/1 up, line protocol up, Eth VLAN 50 up
Interworking type is Ethernet
Destination address: 1.1.1.1.6, VC ID: 4, VC status: up
Output interface: Gi0/0/0, imposed label stack {43}
Preferred path: not configured
Default path: active
Next hop: 10.177.183.2
Create time: 00:00:04, last status change time: 00:00:04
Last label FSM state change time: 00:00:04
Signaling protocol: LDP, peer 1.1.1.1.6:0 up
Targeted Hello: 1.1.1.1.7(LDP Id) -> 1.1.1.1.6, LDP is UP
Status TLV support (local/remote) : enabled/supported
LDP route watch : enabled
Label/status state machine : established, LruRru
Last local dataplane status rcvd: No fault
Last BFD dataplane status rcvd: Not sent
Last BFD peer monitor status rcvd: No fault
Last local AC circuit status rcvd: No fault
Last local AC circuit status sent: No fault
Last local PW i/f circ status rcvd: No fault
Last local LDP TLV status sent: No fault
Last remote LDP TLV status rcvd: No fault
Last remote LDP ADJ status rcvd: No fault
MPLS VC labels: local 17, remote 43
Group ID: local 0, remote 0
MTU: local 9216, remote 9216
Remote interface description:
Sequencing: receive disabled, send disabled
Control Word: Off
SSO Descriptor: 1.1.1.1.6/4, local label: 17
Dataplane:
SSM segment/switch IDs: 4135/4134 (used), PWID: 1
VC statistics:
transit packet totals: receive 0, send 0
transit byte totals: receive 0, send 0
transit packet drops: receive 0, seq error 0, send 0
Test 6 : Farklı service vlanlar Kullanımı :
Konfigurayon :
Her iki tarafda vlan modda ise sorun yok. ASR’da port modda kullanmanın bir anlamı yok. ASR bir S-Vlanı ile gelmiş olması gerek zaten.
ASR’da QiQ yapmak için :
interface GigabitEthernet0/0/1
mtu 9216
no ip address
negotiation auto
cdp enable
service instance 1 ethernet
encapsulation dot1q 1-4094
rewrite ingress tag push dot1q 50 symmetric
xconnect 1.1.1.1.7 4 encapsulation mpls
!
kullanılabilir.
Her iki tarafda Vlan modda ise nasıl S-Vlanlar farklı olabilir?Subinterface ile S-Vlan’ın onemi yok zira karşıya taşınmıyor!
PE-2 :
interface GigabitEthernet0/0/1.60
encapsulation dot1Q 60
xconnect 1.1.1.1.7 4 encapsulation mpls
!
interface GigabitEthernet0/0/2
no ip address
negotiation auto
cdp enable
!
interface GigabitEthernet0/0/2.50
encapsulation dot1Q 60 second-dot1q 200
ip vrf forwarding test
ip
PE-3 :
interface GigabitEthernet0/0/1
mtu 9216
no ip address
negotiation auto
!
interface GigabitEthernet0/0/1.50
encapsulation dot1Q 50
xconnect 1.1.1.1.6 4 encapsulation mpls pw-class test
Kontrol :
PE-3#show mpls l2transport vc detail
Local interface: Gi0/0/1.50 up, line protocol up, Eth VLAN 50 up
Interworking type is Ethernet
Destination address: 1.1.1.1.6, VC ID: 4, VC status: up
Output interface: Gi0/0/0, imposed label stack {36}
Preferred path: not configured
Default path: active
Next hop: 10.177.183.2
Create time: 00:00:51, last status change time: 00:00:08
Last label FSM state change time: 00:00:10
Signaling protocol: LDP, peer 1.1.1.1.6:0 up
Targeted Hello: 1.1.1.1.7(LDP Id) -> 1.1.1.1.6, LDP is UP
Status TLV support (local/remote) : enabled/supported
LDP route watch : enabled
Label/status state machine : established, LruRru
Last local dataplane status rcvd: No fault
Last BFD dataplane status rcvd: Not sent
Last BFD peer monitor status rcvd: No fault
Last local AC circuit status rcvd: No fault
Last local AC circuit status sent: No fault
Last local PW i/f circ status rcvd: No fault
Last local LDP TLV status sent: No fault
Last remote LDP TLV status rcvd: No fault
Last remote LDP ADJ status rcvd: No fault
MPLS VC labels: local 20, remote 36
Group ID: local 0, remote 0
MTU: local 9216, remote 9216
Remote interface description:
Sequencing: receive disabled, send disabled
Control Word: On (configured: autosense)
SSO Descriptor: 1.1.1.1.6/4, local label: 20
Dataplane:
SSM segment/switch IDs: 4161/8254 (used), PWID: 1
VC statistics:
transit packet totals: receive 0, send 0
transit byte totals: receive 0, send 0
transit packet drops: receive 0, seq error 0, send 0
PE-3#ping vrf test 5.5.5.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 5.5.5.2, timeout is 2 seconds:
.!!!!
Success rate is 80 percent (4/5), round-trip min/avg/max = 1/1/1 ms
PE-3#
Sonuç :
Packet capture’da bu durum gorulebilir. Sadece C vlan taşınıyor.
Test 7 Service instance farklı S-Vlan kullanımı
Konfigurasyon :
PE-2 :
interface GigabitEthernet0/0/1
mtu 9216
no ip address
negotiation auto
cdp enable
service instance 1 ethernet
encapsulation dot1q 60
xconnect 1.1.1.1.7 4 encapsulation mpls
!
!
PE-3 :
pseudowire-class test
encapsulation mpls
!
!
interface GigabitEthernet0/0/1
mtu 9216
no ip address
negotiation auto
service instance 1 ethernet
encapsulation dot1q 50
xconnect 1.1.1.1.6 4 encapsulation mpls pw-class test
!
!
Kontrol :
PE-3#show mpls l2transport vc detail
Local interface: Gi0/0/1 up, line protocol up, Eth VLAN 50 up
Interworking type is Ethernet
Destination address: 1.1.1.1.6, VC ID: 4, VC status: up
Output interface: Gi0/0/0, imposed label stack {34}
Preferred path: not configured
Default path: active
Next hop: 10.177.183.2
Create time: 00:02:17, last status change time: 00:01:27
Last label FSM state change time: 00:01:27
Signaling protocol: LDP, peer 1.1.1.1.6:0 up
Targeted Hello: 1.1.1.1.7(LDP Id) -> 1.1.1.1.6, LDP is UP
Status TLV support (local/remote) : enabled/supported
LDP route watch : enabled
Label/status state machine : established, LruRru
Last local dataplane status rcvd: No fault
Last BFD dataplane status rcvd: Not sent
Last BFD peer monitor status rcvd: No fault
Last local AC circuit status rcvd: No fault
Last local AC circuit status sent: No fault
Last local PW i/f circ status rcvd: No fault
Last local LDP TLV status sent: No fault
Last remote LDP TLV status rcvd: No fault
Last remote LDP ADJ status rcvd: No fault
MPLS VC labels: local 22, remote 34
Group ID: local 0, remote 0
MTU: local 9216, remote 9216
Remote interface description:
Sequencing: receive disabled, send disabled
Control Word: On (configured: autosense)
SSO Descriptor: 1.1.1.1.6/4, local label: 22
Dataplane:
SSM segment/switch IDs: 4165/4162 (used), PWID: 1
VC statistics:
transit packet totals: receive 0, send 5
transit byte totals: receive 0, send 720
transit packet drops: receive 0, seq error 0, send 0
PE-3#ping vrf test 5.5.5.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 5.5.5.2, timeout is 2 seconds:
…..
Success rate is 0 percent (0/5)
PE-3#
Sonuç :
Packet capture goruleceği gibi S vlan ve C vlan beraber iletiyliyor. Dolayısı ile karşı tarafdaki S vlan ile eşleşmiyor.
Bunun için her iki tarafdada S vlanlar pop edilmelidir.
PE-3 :
interface GigabitEthernet0/0/1
mtu 9216
no ip address
negotiation auto
service instance 1 ethernet
encapsulation dot1q 50
rewrite ingress tag pop 1 symmetric
xconnect 1.1.1.1.6 4 encapsulation mpls pw-class test
!
PE-2 :
interface GigabitEthernet0/0/1
mtu 9216
no ip address
negotiation auto
cdp enable
service instance 1 ethernet
encapsulation dot1q 60
xconnect 1.1.1.1.7 4 encapsulation mpls
!
ME 3600 ve Ethernet over MPLS kullanımı :
Test 1 PE tarafında subinterface tanımı kullanmak :
PE-2 tarafında devre subinterface ile alınır ise, ilk vlan tag S vlan encapsulation komutu ile interface’den giderken eklenir ve pseudowire gonderilirken çıkartılır.
3600NNI tani EVC kullanılan tarafda ise herhangi bir rewrite işlemi yapılmaz ise paketler geldikleri gibi gönderilir.
3600NNI tarafında service vlan’ı pseudowire aktarılır iken çıkartıldığı zaman sorun çözülmüş olur.
Bu şekilde iki uçda farklı S-Vlan kullanmakda mümkün olur.
Test 2 2 Adet S vlan 1 S vlan’a olarak iletmek :
