ELTEX ESR-3100 - MPLS over GRE; L2 Vpn

ESR series service routers.ESR-Series. User manual
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*> 65501:2 10.104.0.1/32 -- -- 19 100 --
65513 i
*> 65501:1 10.103.0.1/32 -- -- 18 100 --
65512 i
*>i 65501:2 10.101.0.1/32 10.11.1.2 -- 29 100 0
65501 65511 i
*>i 65501:1 10.100.0.1/32 10.11.1.2 -- 30 100 0
65501 65510 i
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CE4# ping 10.104.0.1 source ip 10.101.0.1 detailed
PING 10.104.0.1 (10.104.0.1) from 10.101.0.1 : 56 bytes of data.
64 bytes from 10.104.0.1: icmp_seq=1 ttl=0 time=2.25 ms
64 bytes from 10.104.0.1: icmp_seq=2 ttl=0 time=2.08 ms
64 bytes from 10.104.0.1: icmp_seq=3 ttl=0 time=2.15 ms
64 bytes from 10.104.0.1: icmp_seq=4 ttl=0 time=2.12 ms
64 bytes from 10.104.0.1: icmp_seq=5 ttl=0 time=2.09 ms
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CE1# ping 10.103.0.1 source ip 10.100.0.1 detailed
PING 10.103.0.1 (10.103.0.1) from 10.100.0.1 : 56 bytes of data.
64 bytes from 10.103.0.1: icmp_seq=1 ttl=0 time=2.22 ms
64 bytes from 10.103.0.1: icmp_seq=2 ttl=0 time=2.11 ms
64 bytes from 10.103.0.1: icmp_seq=3 ttl=0 time=2.09 ms
64 bytes from 10.103.0.1: icmp_seq=4 ttl=0 time=2.09 ms
64 bytes from 10.103.0.1: icmp_seq=5 ttl=0 time=2.11 ms
12.13 MPLS over GRE
This section provides example of configuration of VPN servicesbuilt through a GRE tunnel.
12.13.1 L2VPN
Example of configuration of EoMPLS over GRE as a l2vpn service is given below.It is also possible to build
VPLS over GRE (BGP or LDP signaling).
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When configuring MTU on a tunnel, consider the following:
At least one mpls label will be present when passing through the tunnel. Accounting should
include all labels in the stack, for example,explicit null or entropy label;
vlan and q-in-q headers must be taken into account (if they present);
If MTU of the outgoing interface is exceeded, the packet will be dropped (if GRE trafficmatch
fragment is disabled);
Control world is not supported;
DF bit will be set to 1.
Approximatepacket structure is given in figure below:
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