JNCIA # 1

• FreeBSD (UNIX)

• Separate control and forwarding plane

• Control plane

• Maintains the routing tables, bridging table, and primary forwarding

table. (RE)

• Forwarding plane

• Forwarding packets, rate-limiting, cos, stateless firewall, built on

ASICs. (PFE, PIC/PIM, cFEB)

• Control and Forwarding plane are connected through an internal link.

• Transit and exception traffic

• Transit traffic handled solely by PFE. Traffic going only through the

router.

• Exception traffic is handled by RE.

• Packets addressed to the RE (telnet, ssh, pings)

• IP packets with option field set

• Traffic that requires special processing (ICMP reply messages)

• Processes

Root> show system processes extensive

Last pid: 1527; load averages: 0.26, 0.10, 0.16 up 0+00:12:31 14:17:54

107 processes: 2 running, 87 sleeping, 18 waiting

Mem: 144m active, 61m inact, 52m wired, 224m cache, 60m buf, 7512k free

Swap: 1024M total, 1024M free

Pid username thr pri nice size res state time wcpu command

11 root 1 171 52 0K 12K RUN 10:07 88.18% idle

1313 root 1 96 0 11876K 7956K select 0:01 0.00% snmpd

1315 root 1 4 0 42536K 10720K kqread 0:01 0.00% rpd

1320 root 1 96 0 10256K 4604K select 0:01 0.00% pfed

1343 root 3 20 0 7396K 2472K sigwai 0:09 0.05% jddosd

1494 root 1 96 0 109M 6232K select 0:00 0.00% chassisd

• Juniper routers

• M-series – Service provider edge, enterprise edge (M-7i, M-320)

• J-series – Branch edge (J-2320)

• T-series – Service provider core (ie. T-640)

• PTX-series – Service provider supercore (ie. PTX5000)

• SRX-series – Firewalls (Branch - SRX210, Enterprise SRX1400)

• EX-series – L2/L3 switches (ie. EX4200)