![]() Oracle Linux 5 is not supported, even if it supports GRE Ethernet tunnels in its UEK kernel (Linux version 2.6.39-400.21.1.el5uek for OEL5.9). ![]() This procedure uses Oracle Linux 6.4 as a base for setting up the GRE Ethernet tunnels, as Oracle Linux version 6 provides a UEK kernel (Linux version 2.6.39-400.109.1.el6uek at time of writing) capable of setting up GRE Ethernet tunnels, as well as the correct version of the iproute package (iproute-2.6.86_64 for Oracle Linux 6.4) required to add, delete, or modify GRE Ethernet tunnels. Looking at the outputs, it can be seen that the second session is offloaded.Linux supports GRE Ethernet tunneling from kernel version 2.6.28, and requires an up-to-date version of the iproute package containing the utilities (specifically the IP utility) to set up and configure GRE Ethernet tunnel ( gretap) interfaces. Serial=005d9f3b tos=ff/ff app_list=0 app=0 url_cat=0 ![]() Misc=0 policy_id=10 auth_info=0 chk_client_info=0 vd=0 Tx speed(Bps/kbps): 43/0 rx speed(Bps/kbps): 0/0 Statistic(bytes/packets/allow_err): org= reply=0/0/0 tuples=2 Misc=0 policy_id=8 auth_info=0 chk_client_info=0 vd=0 Tx speed(Bps/kbps): 12/0 rx speed(Bps/kbps): 0/0 GRE passthrough means, FortiGate offloading GRE traffic 'flowing' through FortiGate. GRE tunnel means, FortiGate offloading the GRE tunnel that is terminated on FortiGate. (GRE tunnel cannot be enabled using a CLI command.) Some of these parameters are configurable, however, GRE is not one of them. Use the # diagnose npu np6 npu-feature command to see the NP6 features that are enabled on the FortiGate and those that are not. Name: toFG1 ip: 0.0.0.0 0.0.0.0 status: up netbios-forward: disable type: tunnel netflow-sampler: disable sflow-sampler: disable scan-botnet-connections: disable explicit-web-proxy: disable explicit-ftp-proxy: disable wccp: disable Note: Both routing tables show that the remote subnets 10.x.x.x appear as pseudo-connected (a static route appearing as directly connected and pointing to a local interface instead of a next-hop). ![]() I - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2Į1 - OSPF external type 1, E2 - OSPF external type 2 Codes: K - kernel, C - connected, S - static, R - RIP, B - BGP
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