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authorDave Barach <dave@barachs.net>2016-06-09 15:32:48 -0400
committerChris Luke <chris_luke@cable.comcast.com>2016-06-09 20:37:56 +0000
commit96e1203e1bf0adafc5cd85b92fd28265019fe716 (patch)
treeb861fc39475852a9287c69b636806c95ef7c17d1 /vlib
parentdb7b2697360dbcc6198ec0518db817050876fef2 (diff)
VPP-133: increase size of cli process stacks
Change-Id: Ic488b95b54438028940403b02a5916347c53bd05 Signed-off-by: Dave Barach <dave@barachs.net>
Diffstat (limited to 'vlib')
-rw-r--r--vlib/vlib/unix/cli.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/vlib/vlib/unix/cli.c b/vlib/vlib/unix/cli.c
index 92c6941ad41..5136da516fc 100644
--- a/vlib/vlib/unix/cli.c
+++ b/vlib/vlib/unix/cli.c
@@ -2196,7 +2196,7 @@ static u32 unix_cli_file_add (unix_cli_main_t * cm, char * name, int fd)
static vlib_node_registration_t r = {
.function = unix_cli_process,
.type = VLIB_NODE_TYPE_PROCESS,
- .process_log2_n_stack_bytes = 14,
+ .process_log2_n_stack_bytes = 16,
};
r.name = name;
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# Active-Passive NAT HA {#nat_ha_doc}

## Introduction

One NAT node actively manages traffic while the other is synchronized and ready to transition to the active state and takes over seamlessly and enforces the same NAT sessions when failure occur. Both nodes share the same configuration settings.

## Configuration

### NAT HA protocol
Session synchronization traffic is distributed through an IPv4 UDP connection. The active node sends NAT HA protocol events to passive node. To achieve reliable transfer NAT HA protocol uses acknowledgement with re-transmission. This require the passive node to respond with an acknowledgement message as it receives the data. The active node keeps a record of each packet it sends and maintains a timer from when the packet was sent. The active node re-transmits a packet if the timer expires before receiving the acknowledgement.

### Topology

The two NAT nodes have a dedicated link (interface GE0/0/3 on both) to synchronize NAT sessions using NAT HA protocol.

```
        +-----------------------+
        |    outside network    |
        +-----------------------+
         /                     \
        /                       \
       /                         \
      /                           \
     /                             \
+---------+                   +---------+
| GE0/0/1 | Active    Passive | GE0/0/1 |
|         |                   |         |
|  GE0/0/3|-------------------|GE0/0/3  |
|         |   sync network    |         |
| GE0/0/0 |                   | GE0/0/0 |
+---------+                   +---------+
     \                             /
      \                           /
       \                         /
        \                       /
         \                     /
        +-----------------------+
        |    inside network     |
        +-----------------------+
```

### Active node configuration

```
set interface ip address GigabitEthernet0/0/1 10.15.7.101/24
set interface ip address GigabitEthernet0/0/0 172.16.10.101/24
set interface ip address GigabitEthernet0/0/3 10.0.0.1/24
set interface state GigabitEthernet0/0/0 up
set interface state GigabitEthernet0/0/1 up
set interface state GigabitEthernet0/0/3 up
set interface nat44 in GigabitEthernet0/0/0 out GigabitEthernet0/0/1
nat44 add address 10.15.7.100
nat ha listener 10.0.0.1:1234
nat ha failover 10.0.0.2:2345
```

### Passive node configuration

```
set interface ip address GigabitEthernet0/0/1 10.15.7.102/24
set interface ip address GigabitEthernet0/0/0 172.16.10.102/24
set interface ip address GigabitEthernet0/0/3 10.0.0.2/24
set interface state GigabitEthernet0/0/0 up
set interface state GigabitEthernet0/0/1 up
set interface state GigabitEthernet0/0/3 up
set interface nat44 in GigabitEthernet0/0/0 out GigabitEthernet0/0/1
nat44 add address 10.15.7.100
nat ha listener 10.0.0.2:2345
```