: GRE.
GRE, .
3.2.1 3.1.
3.2.2 IP- , 3.1.
3.2.3 vi.
3.2.4. GRE.
3.2.5 ping.
3.2.6 .
: :
VRX-1010-E1 2 .
DES-3526 2 .
- 4 .
3.3 .
3.3.1 3.1.
3.1
3.3.2 1 1.3.11.
3.3.3 eth0 GRE:
# ip tunnel add tun0 mode gre remote <IP-hdlc0-remote> local <IP-hdlc0> ttl 255
remoteIP IP- hdlc0 ;
localIP IP- hdlc0 ;
ttl time to live IP.
3.3.4 tun0:
# ip link set tun0 up
3.3.5 IP- tun0, :
# ip addr add <tunnel_IP> dev tun0
tunnel_IP IP- tun0 .
3.3.6 IP- tun0 :
# ip route add <remote_tunnel_IP> dev tun0
remote_tunnel_IP IP- tun0 .
3.3.7 IP- :
# ip route add <IP-remote_net>/24 dev tun0
IP-remote_net IP- ;
24 .
3.3.8 ICMP .
3.1 3
| . | IP- tun0 (tunnel_IP) | IP- 1 (PC1) | IP- 2 (PC2) |
| 192.168.15.1 | 192.168.1.2 | 192.168.1.3 | |
| 192.168.15.2 | 192.168.2.2 | 192.168.2.3 | |
| 192.168.15.3 | 192.168.4.2 | 192.168.4.3 | |
| 192.168.15.4 | 192.168.5.2 | 192.168.5.3 | |
| 192.168.15.5 | 192.168.7.2 | 192.168.7.3 | |
| 192.168.15.6 | 192.168.8.2 | 192.168.8.3 | |
| 192.168.15.7 | 192.168.10.2 | 192.168.10.3 | |
| 192.168.15.8 | 192.168.11.2 | 192.168.11.3 | |
| 192.168.15.9 | 192.168.13.2 | 192.168.13.3 | |
| 192.168.15.10 | 192.168.14.2 | 192.168.14.3 |
3.3.9 :
# ifconfig
# netstat -rn
3.3.10 .
3.4.1 ?
3.4.2 .
3.4.3 GRE.
|
|
|
3.4.4 GRE .
3.4.5 GRE.
3.4.6 , eth0?
3.4.7 ip address, ip route.
3.4.8 IP-.
3.4.9 ?
3.4.10 ICMP.
4. Ethernet GRE
: Ethernet GRE (Ethernet over GRE).
.
4.2.1 4.1.
4.2.2 IP- , 4.1.
4.2.3 vi.
4.2.4. Ethernet GRE.
4.2.5 ping.
4.2.6 .
: :
VRX-1010-E1 2 .
DES-3526 2 .
- 4 .
4.3 .
4.3.1 4.1.
4.1
4.3.2 1 1.3.11.
4.3.3 HDLC gretap1:
# ip link add gretap1 type gretap remote <IP-hdlc0-remote> local <IP-hdlc0> ttl 255
IP-hdlc0-remote IP- HDLC ;
IP-hdlc0 IP- HDLC .
4.3.4 :
# ip link set dev gretap1 up ( gretap1)
# brctl addbr br0 ( br0)
# brctl addif br0 gretap1 ( gretap1 br0)
4.3.5 :
# brctl addif br0 eth0 && ip addr add <IP-br0>/24 dev br0 && ip link set br0 up && ip addr del <localIP>/24 dev eth0
IP-br0 - IP- , ;
localIP IP- eth0 .
4.3.6 ICMP .
4.3.7 :
# ifconfig
# netstat -rn
4.3.8 .
4.1 4
| . | IP- br0 (IP-br0) | IP- 1 (PC1) | IP- 2 (PC2) |
| 192.168.16.1 | 192.168.1.2 | 192.168.1.3 | |
| 192.168.16.2 | 192.168.2.2 | 192.168.2.3 | |
| 192.168.16.3 | 192.168.4.2 | 192.168.4.3 | |
| 192.168.16.4 | 192.168.5.2 | 192.168.5.3 | |
| 192.168.16.5 | 192.168.7.2 | 192.168.7.3 | |
| 192.168.16.6 | 192.168.8.2 | 192.168.8.3 | |
| 192.168.16.7 | 192.168.10.2 | 192.168.10.3 | |
| 192.168.16.8 | 192.168.11.2 | 192.168.11.3 | |
| 192.168.16.9 | 192.168.13.2 | 192.168.13.3 | |
| 192.168.16.10 | 192.168.14.2 | 192.168.14.3 |
4.4.1 ?
|
|
|
4.4.2 Linux Bridge?
4.4.3 Ethernet. Ethernet.
4.4.4 MAC-. MAC- IP-, .
4.4.5 ? .
4.4.6 ?
4.4.7 CSMA/CD.
4.4.8 CSMA/CA. CSMA/CD.
1 .. .. . , , . 3- . - .: 2006. 958 .
2 . . Linux . . . .:-, 2007. 288 .
3 ., ., . . , 2- . . . : -, 2009. 944 ., .
| ..... | ...4 |
| 1 1. HDLC G.703. | ....5 |
| 2 2. G.703 ISDN PRI IP/HDLC .... | ....10 |
| 3 3. GRE. | ..15 |
| 4 4. Ethernet GRE | ..17 |
| .. | .20 |
