On 5/3/17 11:33 AM, Алексей Болдырев wrote: > I watched one forum, there is listed in the properties of one license for > Cisco, it says: > > Layer 3 VPN • Multi-VRF CE (VRF-lite); requires IP Services Feature license > • MPLS VPN; requires Advanced IP Feature license > • 26 VRFs
There is no direct limit on the number of VRFs the kernel allows you to create. There are indirect ones -- total memory in the system and limits such as /proc/sys/net/ipv6/route/max_size. By increasing the latter I have created 4k VRFs in a system. > • 8192 MPLS labels > > Especially interested in the figure 8192 MPLS Labels. 8192 labels added in one pass is absurd. There is no reason to support such a number. With the latest version of the MPLS stack in the kernel you can add up to 30 labels in a single route. If you want more you have to either recirculate the packet using routes or recompile the kernel and increase the memory limit and the number of labels limit. > > As I understand it, is it either a limit on the number of labels on the stack > or the total number of labels? > > In Linux, for example, you can specify a common col- lection of labels > through /proc/sys/net/mpls/platforms_labels that just allocates the size of an array which dictates the max label number for that namespace. The array needs to be converted to a hash table at some point. > > Also I would like to know if the openvswitch has a limit of 3 tags in the > stack or the total number of MPLS labels that can send? > someone familiar with OVS needs to answer that.
