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Step Description Command Keys
7 Specify the allowed number of routes
for this VRF
esr(config-vrf)# ip protocols
<PROTOCOLS> max-routes
<VALUE>
<PROTOCOL> – protocol type,
may take following values: rip
(only in global mode), ospf, isis,
bgp;
<VALUE> – amount of routes in
the routing table, takes values
in the range of:
BGP
ESR-1000/1200
/1500/1511
/3100/1700 –
[1..5000000];
ESR-20/21/100
/200 –
[1..2500000],
ESR-10/12V/
12VF/14VF –
[1.. 1000000].
OSPF and IS-IS
ESR-1000/1200
/1500/1511
/1700/3100 –
[1..500000];
ESR-20/21/100
/200 –
[1..300000];
ESR-10/12V/
12VF/14VF –
[1..30000].
8 In the context of address-family VPNv4
BGP configuration, enable extended
attribute transfer
esr(config-bgp-neighbor-af)# send-
community extended
12.7.2 Configuration example
Objective:
Configure L3VPN based on MPLS technology between ESR1 and ESR3. The final result of the configuration is
the appearance of connectivity between nodes connected to the VRF on different routers in the network (i.e.
the union of VRFs on different routers via MPLS transport). In this case, transfer of MPLS service tags for
L3VPN service via MP-BGP and transfer of transport tags to reach nexthop addresses of received BGP routes
must be provided.
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