Implement Cisco L3 Switch for MME,SGW,DNS (S11 Interface)

I try to complete configuration Cisco L3 Switch for S11 interface include DNS. Previous posting just for MME and SGW.

#### Parameter

L3_Switch

Ethernet0/1: MME

Ethernet0/2: SGW

Ethernet0/3: DNS

IP Address & Routing

MME 192.168.16.2/28, gateway (default route) 192.168.16.1

SGW 192.168.20.2/28, gateway (default route) 192.168.20.1

DNS 192.168.21.2/28, gateway (default route) 192.168.21.1

#### Config

L3_Switch#

ip vrf S11_VR

 rd 65000:16

interface Ethernet0/1

 description S11_MME

 ip vrf forwarding S11_VR

 ip address 192.168.16.1 255.255.255.240

 duplex auto

interface Ethernet0/2

 description S11_SGW

 ip vrf forwarding S11_VR

 ip address 192.168.20.1 255.255.255.240

 duplex auto 

interface Ethernet0/3

 description S11_DNS

 ip vrf forwarding S11_VR

 ip address 192.168.21.1 255.255.255.240

 duplex auto 

Implement Juniper L3 Switch for S11 Interface (MME, SGW, DNS)

Another view and perspective example config on Juniper layer 3 switch (L3_Switch) for implement S11 interface (S11_VR). There are 3 interface or node in S11_VR virtual instance, MME, SGW and DNS. Previous posting is implement Cisco L3 Switch for S11 Interface.

#### Parameter

L3_Switch (JunOS)

ge-0/0/1: MME

ge-0/0/2: SGW

ge-0/0/3: DNS

IP Address & Routing

MME 192.168.16.2/28, gateway (default route) 192.168.16.1

SGW 192.168.20.2/28, gateway (default route) 192.168.20.1

DNS 192.168.21.2/28, gateway (default route) 192.168.21.1

#### Config

set interfaces ge-0/0/1 description "S11_MME"

set interfaces ge-0/0/1 ether-options no-auto-negotiation

set interfaces ge-0/0/1 ether-options link-mode full-duplex

set interfaces ge-0/0/1 ether-options speed 100m

set interfaces ge-0/0/1 unit 0 family inet address 192.168.16.1/28

set interfaces ge-0/0/2 description "S11_SGW"

set interfaces ge-0/0/2 ether-options no-auto-negotiation

set interfaces ge-0/0/2 ether-options link-mode full-duplex

set interfaces ge-0/0/2 ether-options speed 100m

set interfaces ge-0/0/2 unit 0 family inet address 192.168.20.1/28

set interfaces ge-0/0/3 description "S11_DNS"

set interfaces ge-0/0/3 ether-options no-auto-negotiation

set interfaces ge-0/0/3 ether-options link-mode full-duplex

set interfaces ge-0/0/3 ether-options speed 100m

set interfaces ge-0/0/3 unit 0 family inet address 192.168.21.1/28

set routing-instances S11_VR instance-type virtual-router

set routing-instances S11_VR interface ge-0/0/1.0

set routing-instances S11_VR interface ge-0/0/2.0

set routing-instances S11_VR interface ge-0/0/3.0

#### Output

user@L3_Switch> show route table S11_VR 

S11_VR.inet.0: 6 destinations, 6 routes (6 active, 0 holddown, 0 hidden)

+ = Active Route, - = Last Active, * = Both

192.168.16.0/28    *[Direct/0] 00:03:22

                    > via ge-0/0/1.0

192.168.16.1/32    *[Local/0] 00:03:22

                      Local via ge-0/0/1.0

192.168.20.0/28    *[Direct/0] 00:03:22

                    > via ge-0/0/2.0

192.168.20.1/32    *[Local/0] 00:03:22

                      Local via ge-0/0/2.0

192.168.21.0/28    *[Direct/0] 00:03:22

                    > via ge-0/0/3.0

192.168.21.1/32    *[Local/0] 00:03:22

                      Local via ge-0/0/3.0

# Traceroute DNS to MME

DNS>

traceroute 192.168.16.2

1 192.168.21.1

2 192.168.16.2

Implement Cisco L3 Switch for S11 Interface

Previous posting about example simple diagram for implement LTE Interface and Virtual Routing in core network. Here are example config on Cisco layer 3 switch (L3_Switch) for S11 interface (S11_VR).

#### Parameter

# L3_Switch

- Ethernet0/1: MME

- Ethernet0/2: SGW

# IP Address & Routing

- MME 192.168.16.2/28, gateway (default route) 192.168.16.1

- SGW 192.168.20.2/28, gateway (default route) 192.168.20.1

#### Config 

L3_Switch#

ip vrf S11_VR

 rd 65000:16

 

interface Ethernet0/1

 description S11_MME

 ip vrf forwarding S11_VR

 ip address 192.168.16.1 255.255.255.240

 duplex auto

interface Ethernet0/2

 description S11_SGW

 ip vrf forwarding S11_VR

 ip address 192.168.20.1 255.255.255.240

 duplex auto 

#### Output

L3_Switch#show ip route vrf S11_VR

Routing Table: S11_VR

Codes: L - local, C - connected, S - static, R - RIP, M - mobile, B - BGP

       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area 

       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2

       E1 - OSPF external type 1, E2 - OSPF external type 2

       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2

       ia - IS-IS inter area, * - candidate default, U - per-user static route

       o - ODR, P - periodic downloaded static route, H - NHRP, l - LISP

       + - replicated route, % - next hop override

Gateway of last resort is not set

      192.168.16.0/24 is variably subnetted, 2 subnets, 2 masks

C        192.168.16.0/28 is directly connected, Ethernet0/1

L        192.168.16.1/32 is directly connected, Ethernet0/1

      192.168.20.0/24 is variably subnetted, 2 subnets, 2 masks

C        192.168.20.0/28 is directly connected, Ethernet0/2

L        192.168.20.1/32 is directly connected, Ethernet0/2

MME>

traceroute 192.168.20.2 

1 192.168.16.1

2 192.168.20.2

  

SGW>

traceroute 192.168.16.2

1 192.168.20.1

2 192.168.16.2