Supported Platforms
Configuring 100-Gigabit Ethernet PIC VLAN Steering Mode
In Junos OS Release 10.4 and later, you can configure the 100-Gigabit Ethernet PIC to interoperate with routers using 100 gigabit Ethernet interfaces from other vendors by using the forwarding-mode statement with the vlan-steering option at the [edit chassis fpc slot pic slot] hierarchy level. On ingress, the router compares the outer VLAN ID against the user-defined VLAN ID and VLAN mask combination and steers the packet accordingly. You can program a custom VLAN ID and corresponding mask for PFE0.
General information on the VLAN steering mode:
- In VLAN steering mode, the SA multicast parameters are not used for packet steering.
- In SA multicast bit steering mode, the VLAN ID and VLAN masks are not used for packet steering.
- Configuration to set the packet distribution mode and VLAN steering rule is done through CLI commands. Both CLI commands result in a PIC reboot.
There are three possible tag types of ingress packet:
- Untagged ingress packet—The packet is sent to PFE1.
- Ingress packet with one VLAN—The packet is forwarded to the corresponding PFE based on the VLAN ID.
- Ingress packet with two VLANs—The packet is forwarded to the corresponding PFE based on the outer VLAN ID.
- If no VLAN rule is configured, all tagged packets are distributed to PFE0.
VLAN rules describe how the router distributes packets. Two VLAN rules are provided by the CLI:
- Odd-Even rule—Odd number VLAN IDs go to PFE1; even number of VLAN IDs go to PFE0.
- Hi-Low rule—VLAN IDs 1 through 2047 go to PFE0; VLAN IDs 2048 through 4096 go to PFE1.
When the 100-Gigabit Ethernet PIC is configured in VLAN steering mode, it can be configured in a two physical interfaces mode or in aggregate Ethernet (AE) mode:
Two physical interfaces mode—When the PIC is in the two physical interfaces mode, it creates the physical interfaces et-x/0/0:0 and et-x/0/0:1. Each physical interface can configure its own logical interface and VLAN. The CLI enforces the following restrictions at the commit time:
- The VLAN ID configuration must comply with the selected VLAN rule.
- The previous restriction implies that the same VLAN ID cannot be configured on both physical interfaces.
AE mode—When the PIC is in aggregated Ethernet mode, the two physical interfaces on the same PIC are aggregated into one AE physical interface. The PIC egress traffic is based on an AE internal hash algorithm. The PIC ingress traffic steering is based on the customized VLAN ID rule. The CLI enforces the following restrictions at the commit time:
- The PICs AE working in VLAN steering mode includes both links of that PIC, and only the links of that PIC.
- The PIC AE working in SA multicast steering mode can include more than one 100-Gigabit Ethernet PIC to achieve more than 100 gigabit Ethernet capacity.
To configure SA multicast mode, use the set chassis fpc slot pic slot forwarding-mode sa-multicast command.
SA Multicast Mode
To configure SA multicast mode on a Juniper Networks 100-Gigabit Ethernet PIC in FPC 0, PIC 0 for interconnection with another Juniper Networks 100-Gigabit Ethernet PIC, use the set chassis fpc slot pic slot forwarding-mode sa-multicast command. You can use the show forwarding-mode command to view the resulting configuration, as follows:
VLAN Steering Mode
To configure the Juniper Networks 100-Gigabit Ethernet PIC for VLAN steering mode for interoperation between a Juniper Networks 100-Gigabit Ethernet PIC in FPC 0, PIC 0 and a 100 gigabit Ethernet interface from another vendor’s router, use the set chassis fpc slot pic slot forwarding-mode vlan-steering command with the vlan-rule (high-low | odd-even) statement. You can use the show forwarding-mode command to view the resulting configuration, as follows:
