Logical Bypass and Physical Bypass
Logical bypass lets traffic bypass the inline tool should it experience a failure. A failure is declared if the GigaVUE node either loses connectivity to the inline tool or fails to receive a heartbeat from the tool.
Logical inline bypass does not require any specialized hardware and can be facilitated on regular ports on GigaVUE‑HC3, GigaVUE‑HC1 and GigaVUE‑HC1-Plus modules. On GigaVUE‑HC1, logical inline bypass can be configured on the base module.
Physical bypass provides protection against failure of the GigaVUE node, such as if power is lost. On GigaVUE® HC Series nodes, it is implemented with specialized hardware called bypass combo modules.
The specialized hardware triggers a bypass when power is lost to the node. When the physical bypass is activated, traffic flows from one side of the network to the other, but without monitoring.
The GigaVUE‑HC3 bypass combo module is a bypass switch (BPS) module, as follows:
| Bypass Combo Module with two 100Gb/40Gb SR4 MPO inline network port pairs and sixteen regular SFP+ (10Gb) port cages (BPS-HC3-C25F2G) |
| Bypass Combo Module with two 40Gb or 100Gb LR4 inline network port pairs and sixteen 10Gb/25Gb cages (BPS-HC3-Q35C2G, and BPS-HC3-C35C2G). |
The GigaVUE‑HC1 bypass combo module is a bypass switch (BPS) module, as follows:
| Bypass Combo Module with two SX/SR (50/125μm multimode) inline network port pairs and four regular SFP+ (1Gb/10Gb) port cages (BPS-HC1-D25A24) |
| Bypass Combo Module with six single-mode LR 1Gb/10Gb inline network port pairs BPS-HC1-D35C60 (LX/LR) and BPS-HC1-D25A60 (SX/SR) . |
The following bypass modules are available for the GigaVUE‑HC1-Plus:
| Bypass Combo Module with two SX/SR (50/125μm multimode) inline network port pairs and four regular SFP+ port cages (BPS-HC1-D25A24). It requires GigaVUE‑HC1-Plus to be running software version 6.3 or higher. It provides both physical and logical inline bypass, with automatic failover protection in case of power failure. The ports can operate at 1Gb/10Gb speeds and can be configured as any port type |
| Bypass modules with six inline network port pairs each, supporting multi-mode SR and single-mode LR, respectively, at 1Gb/10Gb speeds ( BPS-HC1-D25A60 (SX/SR) and BPS-HC1-D35C60 (LX/LR)). |
All these modules are hot-swappable and provide physical bypass protection, ensuring network continuity in the event of a power failure or module removal. The BPS modules provide optical bypass, while the TAP-HC1-G10040 provides copper bypass functionality.
Physical bypass is also supported on the following copper TAP modules on GigaVUE‑HC1 and GigaVUE‑HC1-Plus:
| On the GigaVUE‑HC1 copper TAP module, TAP-HC1-G10040 |
| On the GigaVUE‑HC1-Plus copper TAP module with 8 x 1Gb ports for either four TAPs or bypass copper (BPC) port pairs (TAP-HC1-G10040). It can be used as a copper bypass module, providing protected inline networks for copper ports. It requires GigaVUE‑OS version 6.4 or higher. |
The GigaVUE‑HC3, GigaVUE‑HC1 and GigaVUE‑HC1-Plus offer physical and logical inline bypass. Physical bypass provides automatic failover protection in the case of a power failure. On the GigaVUE HC Series nodes, the bypass combo modules provide the physical bypass function. Or on GigaVUE‑HC1, the copper TAP modules provide the physical bypass function.
The physical bypass function, as it applies to a single pair of inline network ports, is as follows:
| When the module is not powered, (either the entire node is powered down or the module is removed from the node), the inline network port pair is in the physical bypass mode. That means that traffic is exchanged directly between network Port A and network Port B of the inline network pair. |
| When the module is powered, the mode (inline or bypass) of the inline network port pair is controlled through software. In the physical bypass mode, the inline network port pair behaves exactly as if the module was not powered. In the inline mode, the inline network port pair behaves as any other inline network port pair configured for working with an inline tool. |
For information on the bypass combo module on GigaVUE‑HC3, refer to the GigaVUE-HC3 Hardware Installation Guide. This document also contains procedures for installing, removing, and replacing modules in the GigaVUE‑HC3.
For information on the bypass combo module or the TAP-HC1-G10040 module on GigaVUE‑HC1, refer to the GigaVUE-HC1 Hardware Installation Guide. This document also contains procedures for installing, removing, and replacing modules in the GigaVUE‑HC1.
For information on the bypass combo module on GigaVUE‑HC1-Plus, refer to the GigaVUE-HC1-Plus Hardware Installation Guide. This document also contains procedures for installing, removing, and replacing modules in the GigaVUE-HC1-Plus Hardware Installation Guide.
Refer also to 1 and Protected Inline Network.
| 1 | Physical Bypass Protection |
