IEWB-SP-V2を１周してみたが、どうやらCell mode MPLSの設定答えはあるが、肝心なATM-SWの設定がない。本番ではLS1010を操作する必要がないから答え部分以外は省いた感じですね。
でもこの設定が欠けているとフルラボでの検証はできないので、仕方ないので自分で作る必要がある。
細かいこと抜きにして次のようなトポロジで考える
設定に入る前にCell mode mpls over ATMに関してCisco Press様から次のようなことを言われているので、設定に当たっての基礎知識として知っておくとよい。
- In MPLS over ATM networks, routers are connected to ATM-based provider networks consisting of ATM switches that forward data base on virtual circuits (VCs) provisioned on the ATM switches.
- Cell mode MPLS uses the virtual path identifier/virtual channel identifier (VPI/VCI) fields in the ATM header as the label value.
- Aggregation of the number of virtual channels into a single pipe (virtual path) between sites that need a large number of VCs.
- ATM cell switching is done based on a table containing (port, VPI, VCI) tuplets for the input and output side of the VC.To see this table using "show atm vc" command.
OK, so let's start configuration.
■Configuration for PE routers(EX:PE1)
interface ATM1/0
no ip address
no atm ilmi-keepalive
!
interface ATM1/0.1 tag-switching
ip address 1.1.1.1 255.255.255.0
tag-switching ip
!
router ospf 1
log-adjacency-changes
network 1.1.1.1 0.0.0.0 area 0
■Configuration for ATM-SW
interface ATM1/0
no ip address
no atm ilmi-keepalive
!
interface ATM1/0.1 tag-switching
ip address 1.1.1.2 255.255.255.0
tag-switching ip
!
interface ATM2/0
no ip address
no atm ilmi-keepalive
!
interface ATM2/0.1 tag-switching
ip address 2.2.2.2 255.255.255.0
tag-switching ip
!
router ospf 1
log-adjacency-changes
network 1.1.1.2 0.0.0.0 area 0
network 2.2.2.2 0.0.0.0 area 0
■Verifications
PE1#show mpls forwarding-table
Local Outgoing Prefix Bytes tag Outgoing Next Hop
tag tag or VC or Tunnel Id switched interface
16 1/33 2.2.2.0/24 0 AT1/0.1 point2point
ATM-SW#show mpls atm-ldp bindings
Destination: 2.2.2.0/24
Tailend Router ATM1/0.1 1/33 Active, VCD=2, CoS=available
Destination: 1.1.1.0/24
Tailend Router ATM2/0.1 1/33 Active, VCD=2, CoS=available
ATM-SW#show mpls ldp neighbor
Peer LDP Ident: 1.1.1.1:1; Local LDP Ident 1.1.1.2:1
TCP connection: 1.1.1.1.646 - 1.1.1.2.20188
State: Oper; Msgs sent/rcvd: 46/46; Downstream on demand
Up time: 00:38:15
LDP discovery sources:
ATM1/0.1, Src IP addr: 1.1.1.1
Peer LDP Ident: 2.2.2.1:1; Local LDP Ident 1.1.1.2:2
TCP connection: 2.2.2.1.646 - 2.2.2.2.14837
State: Oper; Msgs sent/rcvd: 46/47; Downstream on demand
Up time: 00:37:59
LDP discovery sources:
ATM2/0.1, Src IP addr: 2.2.2.1
ATM-SW#show ip ospf neighbor
Neighbor ID Pri State Dead Time Address Interface
2.2.2.1 0 FULL/ - 00:00:36 2.2.2.1 ATM2/0.1
1.1.1.1 0 FULL/ - 00:00:32 1.1.1.1 ATM1/0.1
PE1#ping 2.2.2.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 2.2.2.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 20/41/60 ms
Now you can answer any questions about Cell-Mode MPLS perfectly ! 
【IEWB-SP-V2の進捗 10/50】
Lab01 ★☆☆☆☆ Lab02 ★☆☆☆☆
Lab03 ★☆☆☆☆ Lab04 ★☆☆☆☆
Lab05 ★☆☆☆☆ Lab06 ★☆☆☆☆
Lab07 ★☆☆☆☆ Lab08 ★☆☆☆☆
Lab09 ★☆☆☆☆ Lab10 ★☆☆☆☆
PR
