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[Archive] Issues With Link Negotiation Between the NetScreen-5GT and Cisco 3550 Switch

  [KB4470] Show Article Properties


Summary:
Issues With Link Negotiation Between the NetScreen-5GT and Cisco 3550 Switch
Symptoms:

Solution:

Note: This article applies to ScreenOS 4.0 and higher.

The NetScreen-5GT will not be able to negotiate a link if its interface has been set to auto-negotiate and the switch interface is set to 10 Mbit/sec. Juniper Networks will only guarantee a solid link if the speed and duplex are identical for both devices. In other words, both sides must be set to either Auto, 10/Full, or 10/half duplex.

noteThere was a bug in ScreenOS 4.0.0-DIAL2r6.3, in that the link would go up and down when both devices were set to 100 Mbit/sec full duplex. This was addressed in ScreenOS 4.0.0-DIAL2r7.3.

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