July 2009
Intermediate to advanced
752 pages
23h 19m
English
Content preview from JUNOS Enterprise SwitchingBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Chapter Review Answers
Answer: A, B. The 3200 and 4200 both support remote power supply options; however, support is not as common on the 4200, as it also has the option of a redundant power supply.
Answer: False. Only the 8200 series has redundant routing engines; however, the 4200 supports dual REs in a VC configuration.
Answer: B. GRES must be enabled to avoid a forwarding reset. This is not the default behavior of the switch, and must be configured.
Answer: D. VRRP can support multiple routers in a group, a single primary, and multiple backups. In most common deployments a single backup is used.
Answer: C. Non-Stop Routing copies routing tables, databases, and TCP state to the backup routing engine.
Answer: False. Graceful Restart has two types of routers: a restarting router and a helper router. The helper and restarting router must have Graceful Restart configured in order to understand the special messaging that will be exchanged.
Answer: False. Although each member switch may contain a routing engine, only a master and backup routing engine will be active at a given time. The other switch’s routing engine will be in a cold start state.
Answer: C. The partner is the device that will actually send the messages, and the actor is the end of the link that acts on the message. So far, no one has added a producer or director to the script.
Answer: D. When in passive mode, the switch responds to LACP messages—the “Don’t speak until I tell you to” method.
Answer: C. This is the only command ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.